Kieran Culkin kissed his 'Succession' co-star J. Smith-Cameron to celebrate their SAG Award win

• Kieran Culkin and J. Smith-Cameron kissed after "Succession" won at Sunday night's SAG Awards.
• The pair play flirtatious executives Roman Roy and Gerri Kellman in the acclaimed HBO series.

Kieran Culkin kissed his "Succession" co-star J. Smith-Cameron after the hit HBO drama won best ensemble in a drama series at last night's SAG Awards.

The moment was captured by cameras filming the reactions of the "Succession" cast after their win, and is a joyous moment for fans who have been rooting for the unexpected fictional romance between the two.

The intimate relationship between Culkin's bratty heir Roman Roy and Smith-Cameron's authoritative Gerri Kellman was unplanned but the natural chemistry between the actors was so strong it became a pivotal dynamic in the series, Culkin revealed in 2019.

"We kind of just have a really fun rapport," Culkin told Entertainment Weekly. "I would, in character as Roman all throughout the first season, flirt with her, and she would just sort of flick me away, bat me like it was nothing."

"We just did that like the whole season until like the end, apparently. ['Succession' director] Mark Mylod told me later that he saw in the edit room that I went up to her, I said something vile, and she just sort of dismissed me, and then as I walked away, I checked out her ass and then turned around without knowing that she turned around and checked out my ass. He said he thought that was really funny, and they talked about that dynamic and thought they should sort of try it."

Culkin and Smith-Cameron's kiss is the closest "Succession" fans have seen to physical intimacy between the pair.

Their dynamic has only extended to Gerri calling Roman twisted sexual insults like "over-excited little boy," "spoiled brat," "disgusting little pig," "revolting little worm," and "little slime puppy."

Last year Smith-Cameron revealed that she improvised the infamous "slime puppy" insult, which has become an affectionate nickname for Culkin and his character.

"I made up slime puppy," Smith-Cameron said. "I'm proud of slime puppy. It's my contribution to American literature."