Chris Hemsworth, Jared Padalecki, Jack Osbourne: Celebs Who Became Dads in 2012 (GALLERY)

Hollywood's hottest dads show off their buff bods.
Meet Hollywood's sexiest fathers.
They say that marriage is “the biggest club in the world,” but if that’s the case, then becoming a Dad comes in at a reasonable second.

In 2012, many celebs became fathers — some, like Chris Hemsworth, for the first time, others, such as Ben Affleck, who are already expert hands around the diaper bin.

In today’s Celebuzz gallery, we salute the Hollywood men who gave away (some) of their nightlife (or sleeping) hours this year in exchange for warming bottles and administering ear medication.

Some of Hollywood’s newest members to the dad club will need to dust off their copies of Babies for Dummies, including Bruce Willis, who hasn’t had a new baby to cuddle since welcoming daughter Tallulah with his then-wife Demi Moore 17 years ago.

Who do you think is the sexiest new Dad of 2012?  Enjoy the galleryof Hollywood’s hottest dads — then share your favorite in the comments below.

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