Chrissy Teigen Can't Wait for Morning Sickness, Pregnancy Cravings

Given Chrissy Teigen's famously outspoken social media tendencies, consider this just a taste of what's to come now that she's pregnant!

The 29-year-old supermodel announced that she and her husband, singer John Legend, are expecting their first child together on Monday, and is already getting real about how it's going so far.

"I am so excited I could barf 4-5 times a day," Chrissy joked on Tuesday.

WATCH: Chrissy Teigen and John Legend Are Expecting a Baby!

But it's not just morning sickness she's apparently looking forward to -- it's also giving in to her food cravings.

"I have come to realize that at some point in the day, I will order and consume a pizza so it might as well be in the morning," she hilariously tweeted.

Chrissy's life-changing news is especially exciting given how candid she's been about her and John's fertility struggles. She opened up about the media pressure to grow her family on her FABLife talk show in September.

"Every single time I sit down for an interview with anybody....I will say, just being two years into being married, the questions just come from all over," she shared. "It's kind of crazy because I can't imagine being that nosy to be like, 'So, when are the kids coming?' because who knows what somebody's going through."

"John and I were having trouble," she confirmed. "We would have had kids five, six years ago if it had happened. But my gosh, it's been a process."

When ET caught up with Chrissy late last month, she was just as open as ever about her struggles.

"It would've been odd for me not to talk about it on the show because it's been such a huge part of our life," she said. "I've been doing this for years. It's been weird to hide it from people, but I didn't want to just tweet, 'Doin' my shots again!'"

"He's fine talking about it," she added about John's reaction to sharing something so private. "We've been open about it to absolutely everybody in our life. All of our friends have known for years now."

Chrissy and John, 36, married in September 2013, after meeting on the set of his 2007 music video for "Stereo."

"As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family," Chrissy Instagrammed on Monday. "We're so excited that it's finally happening. ... I look forward to all the belly touching!"

WATCH: Chrissy Teigen Says Fights With John Legend Are 'Lame' -- 'Nothing Really Triggers Him'

Watch the video below for more on the couple's exciting baby news!