ENTERTAINMENT
02/25/2016 09:25 am ET

Mayim Bialik And Johnny Galecki Reenact Their '90s Kiss From 'Blossom'

It all started with a big smooch.

Look away, Sheldon!

Mayim Bialik and Johnny Galecki, aka Amy and Leonard, apparently had a history together way before they met up again on "The Big Bang Theory." It all resurfaced when the cast visited Conan O'Brien's show on Wednesday. 

Conan brought up how the pair actually appeared together on Bialik's '90s show, "Blossom." He even dug up a picture showing a kissing scene between the two. 

Their co-star Kunal Nayyar chimed in with, "Do it again!" 

There was some understandable hesitation (their "Big Bang" love interests, Penny and Sheldon, were right there), but eventually the pair locked lips once again. (Yay, peer pressure!)

Can someone please sing "Soft Kitty" to Sheldon, though? Dude's probably not taking this well.

HuffPost

BEFORE YOU GO

PHOTO GALLERY
'The Big Bang Theory'
CONVERSATIONS