'Tis the Season for Celebs' Ugly Christmas Sweaters!

The engaged couple donned ugly sweaters to ring in Christmas Eve. "All smiles because I’m in love with you, it’s Christmas and my sweater lights up..." Irwin captioned two holiday pics with Powell.

The Harts both dressed up like Christmas trees for the funny man's Hart Beat Productions holiday party.

"It might be national ugly sweater day, but I’ve got a beautiful family. Merry Christmas y’all," the "Beer Never Broke My Heart" singer captioned an Instagram pic while wearing, appropriately, a Miller Lite sweater as he posed with his fiancée, Nicole Hocking, and their dog.

The actor's sweater declared that he was a "subpar gift giver." We'll have to ask his girlfriend, Halsey, how she feels about that!

Jackman and Ryan Reynolds' ugly Christmas sweater prank continued for yet another year, with the Aussie actor getting the honor of wearing the pullover, which looks like a wrapped present, in 2019. "I can’t believe I agreed to wear the matching underwear too. #thesweaterreturns," Jackman captioned the silly pic, in which he's flashing a huge grin while standing next to Reynolds, who's in a black button-up and jeans.

The Bachelor alum showed off his "naughty" ski hat and festive cat pullover as he posed for a pic next to his girlfriend, who was in her own feline-adorned holiday attire. "Thoughts on my ugly Christmas sweater? ?," Underwood captioned the 'gram, to which Randolph wrote in the replies, "Guess who likes cats now, you guys."

The Olympic gold medalist glided around in an Alaska Airlines sweater and Santa hat while hosting a skating clinic for underprivileged kids in the San Francisco Bay Area at Kristi Yamaguchi’s Downtown Ice in San Jose, California, which was also held in part with her Always Dream Foundation. 

James joined McGee at the Los Angeles Lakers pro's Levi's Haus-hosted 2nd Annual Juglife Ugly Sweater Holiday Party -- and we're pretty sure McGee's pullover tops them all!

Momager of the decade! The BH90210 star did her Black Friday shopping in Malibu, California, while sporting a sweater with the KarJenner family matriarch's face on it that read "Santa works hard but Kris Jenner works harder."

Not only do they play sisters on TV, the Merry Happy Whatever stars also rock matching reindeer-and-snowflake-adorned sweaters!

The actress-producer had an ugly Christmas sweater contest at work, and the results were pretty epic -- just look at that happy smile on her face! Her preppy dog-themed top? Also a winner!

We think the Deadpool star is a present to us all, but he apparently doesn't feel the same way about pals Hugh Jackman and Jake Gyllenhaal. "These f**king a**holes said it was a sweater party. ?," Reynolds captioned a pic of the trio, where he's the only one rocking an ugly Chrismas sweater -- and it's bow-adorned and all!

The engaged reality stars rocked their best ugly sweaters while hosting Sleep Number's Night Under the Mistletoe party in New York City. Yrigoyen's cat-adorned red top read "Have a Meow-y Xmas," while the Bachelorette's sparkly forest green cardigan was covered in colorful pom-poms. 

Also at the soiree were the Bachelor alums, who were both covered in cat-adorned attire.

The country crooner and his pregnant wife appropriately rocked music-themed tops for an ugly sweater party.

The engaged Bachelor in Paradaise couple wore their hearts right on their sleeves -- and chests! Haibon repped the New England Patriots while Iaconetti proclaimed her love for *NSYNC at KIIS FM's Jingle Ball 2018 in Inglewood, California.

The producer wore -- what else -- a shirt with his own face on it for the 2018 Y100 Jingle Ball in Sunrise, Florida, though for the holiday season, his "X" eyes and smile were surrounded by Christmas lights as well.

The rocker made Grinch look downright cheerful while performing during the KROQ Absolut Almost Acoustic Christmas 2018 concert at The Forum in Inglewood, California.

All hail the queen of momagers! The TV personality rocked a cheeky sweater that read "Santa works hard but Kris Jenner works harder" with the KarJenner matriach's face embroidered on it when she arrived in Malibu, California, to teach a workout class.

The League alum performed his stand-up set at The Ice House Comedy Club in Pasadena, California, in a punny take on a hit Divinyls song. The bright green sweatshirt featured a very happy Santa and one of his North Pole helpers and read, "When I think about you I touch my elf."

The View co-stars finally saw eye to eye -- with their olive green sweaters! Both donned goofy holiday headbands and red lips to go with their ugly Christmas garb, which for Behar was a zip-up featuring Mr. and Mrs. Claus, while McCain's poncho was covered in ornaments. The duo are smiling in the pic, but McCain joked in the emoji-filled caption, "We'll fight again in 2019! Merry Christmas ya filthy animal!"

Spencer rocked an ugly Christmas sweater while hanging out with his Chicago Fire co-star at the newly opened TAO Chicago during the "One Chicago" holiday party, which celebrated Fire as well as Chicago P.D. and Chicago Med. 

Twinsies! The Today show co-hosts were literally joined at the hip in one giant naughty vs. nice sweater.

This may win for cutest ugly Christmas sweater! While out in Los Angeles, the Baywatch alum was all smiles in her top, which featured a terrier wearing reindeer ears.

We hope he wears this down to the honkytonk! The country singer proudly rocked his Pillsbury Doughboy sweater while posing next to a lit-up Christmas tree in Nashville, Tennessee, joking on Instagram, "Now excuse me while I go bake some cinnamon rolls and get in the Christmas spirit."

Keep on truckin'! While at the Roc Nation holiday party, the "Flipmode" rapper's sweater had quite a few elements to it, but the centerpiece was a pick-up carrying a Christmas tree! 

The This Is Us actress gave her sweater a chic touch, pairing the reindeer-and-snowflake-adorned top with a black-and-white checkered skirt and black combat boots for the Project Hollywood Helpers community service event at the Skirball Cultural Center in Los Angeles.

Emo kids never say die! For the 6th Annual Winter Wonderland Party in Los Angeles, the "On the Way Down" singer rocked a Christmas sweater full of skulls from his pal, Avril Lavigne's, clothing line, Abbey Dawn.

How festive is this? Not only was the Love & Hip-Hop alum flashing a peace sign while wearing a leopard-print sweater with a bundled-up cat on it, she was also surrounded by two ladies dressed up as reindeer at Think It's a Game Records' annual ugly Christmas sweater party in Atlanta, Georgia.

The fellow X Factor winners (Lewis won the British series in 2006 and Arthur took home first place in 2012) donned ugly holiday sweaters that Lewis launched exclusively to benefit her charity, Hopefield Animal Sanctuary. The cute critters on the shirts are actually some of the sanctuary's rescue animals!

Shepard stayed on-theme while supporting his wife, Kristen Bell, at the premiere of her movie, A Bad Moms Christmas, rocking a reindeer- and Christmas tree-adorned sweater for the occasion. 

In 2017, the Bad Moms Christmas star was swimming in a sea of dancing Santas!

The Vinyl star sent a very direct message while walking in New York City, opening her coat to reveal a red sweater that read "impeach" in all-caps.

"I just wanted to make sure I was comfortable for the show," the "Misery" singer joked on her Instagram story while showing off the over-the-top elf costume she slipped into to watch The Voice and her NBC Christmas special, You Make It Feel Like Christmas.

Jimmy Fallon was much more amused by this oversized, snowflake-adorned cardigan than Waltz was when the Austrian actor appeared on The Tonight Show.

The Saturday Night Live alum's Yoda sweater was on point, it was -- especially since he wore it to the Hollywood premiere of Star Wars: The Last Jedi!

Some wear their sweaters extra large, but the "Skyscraper" singer donned a crop top depicting Santa's reindeer, which she paired with black hot pants, matching knee-high boots and fishnets for a performance at the 2015 Y100 Jingle Ball in Sunrise, Florida.

The Deadpool star looked quite dapper in his bowtie and cardigan combo.

Who needs a BFF necklace when you can have matching knits? Even better? These Glee pals' bright blue shirts featured a cat skiing. We. Know.

Stop it with this cuteness! The rapper and his bulldog, Maximus, rocked matching green-and-white puppy sweaters.

Urkel rocked a Drake sweater to Geoff Stults' West Hollywood birthday party, and we can't get enough of it.

Queen Bey was anything but incognito when she stepped out of her New York City office building in Midtown dressed in a Christmas tree costume. The ensemble included a Santa hat, lights, crazy sunglasses, ornaments and a big bow on the back of the festive coat.

The Red Hot Chili Peppers bassist rocked out with Krampus at the Los Angeles premiere of Her.

Goldberg's love of flamboyant sweaters is pretty well known, and Cohen and Moore were gifted with their own Hanukkah and Christmas gear to join her in the fashion statement when the actresses appeared on Watch What Happens Live With Andy Cohen.

The producer rocked one of his famous hats along with a wintery blue topper while performing onstage at A Very GRAMMY Christmas at the Shrine Auditorium in L.A.

The TV host was smiling pretty in her snowman-adorned sweater while visiting Hallmark's Home & Family at Universal Studios Hollywood.

The Tegan and Sara singer belted out tunes at the 98.7FM Penthouse Party in Hollywood while rocking a beaut of a wreath-and-plaid sweater.

Matthew McConaughey's wife wasn't sheepish about her dad joke "Fleece Navidad" sweater as she rolled into LAX airport.

We would also like to have a very Murray Christmas!

The "Better With You" singer was just livin' that pug life at LAX airport.

Cat got your sweater? The Into the Woods star didn't look quite as grumpy as the feline on his chest at the Anchorman 2: The Legend Continues premiere in New York City.