Take Mike Hannigan, played by Paul Rudd, who was Phoebe’s husband on the show.

It’s not about Mike Hannigan'" (viaRadioTimes).

However, Williams made a brief appearance on Central Perk’s sofa in season three.

Paul Rudd

Apparently Williams' guest star appearance wasn’t exactly planned.

The writers jumped in and asked them if they wanted to be a part of the show.

No one can deliver the line “Can you scooch?”

Robin Williams

quite like Robin Williams.

Susie was a former classmate of Chandler’s from grade school (viaScreenRant).

Roberts plusFriendsAND the Super Bowl sound like an absolute touchdown.

Julia Roberts