Celebrities & Their Twin Siblings!

Who knew?

From Brazilian bombshell Gisele Bundchen to Two and a Half Men star Ashton Kutcher, Wednesday's ET reveals the lesser-known counterparts of your favorite celebrities—their twins!

Video: Tori Spelling Talks 'Practically Raising Twins'

Also tomorrow, more on Kate Middleton's pregnancy and Britney Spears gives us an update on her upcoming wedding.