Good news slime puppies: Kieran Culkin says he and J. Cameron-Smith will keep in touch after Succession
As for the rest of his Succession cast members, Kieran Culkin says it's a little more complicated

Succession’s hottest and most sexually twisted couple plans on staying in contact even as the show wraps up with its fourth season. As many cast members now look beyond the acclaimed HBO series, Kieran Culkin says while keeping in consistent contact with everyone will not be possible, J. Smith Cameron is high on the call list.
“I’m not really going to keep up a proper relationship with anybody just because of logistics,” Culkin says, due to the cast’s permanent residencies all over the world. “It’s a big, big loss.”
The two’s closeness on set led to the show’s writers concocting a romance between Logan Roy’s right hand, Gerri, and his youngest son, Romulus. While the two never reached the status of OTP, they gave us a compelling couple to root for in the series devoid of any true romance. Smith-Cameron and Culkin have both played into their chemistry over the years on red carpets and award stages.
“We were kind of always flirting on set,” Smith-Cameron says of her co-star in an interview with Esquire. “It was never for one second a real flirtation. It was that set-crush kind of thing.”