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Fuller House: John Stamos Tweets a Photo of Nicky and Alex on Set

They're all grown up — have mercy!

Liz Raftery

Nicky and Alex are all grown up!

Days after news broke that twins Blake and Dylan Tuomy-Wilhoit would be reprising their roles as the twin sons of Becky (Lori Loughlin) and Jesse (John Stamos) on Fuller House, Stamos tweeted a picture of his on-screen sons, both of whom are now in their 20s.

"Boy, your sons grow up fast when you don't see them for 20 yrs," Stamos captioned the before-and-after shot. Bob Saget can be seen in the background of the shot.

The Tuomy-Wilhoits, 24, were last seen as shaggy-haired toddlers on the series.

Check out pictures from the set of Fuller House

Fuller House, which is expected to premiere on Netflix in 2016, will feature nearly all the original cast members reprising their roles. Mary-Kate and Ashley Olsen, who have not yet officially signed on, are reportedly also mulling a return.

Check out Stamos' photo below.