Matt Oberg, Stephnie Weir and Megan Ferguson have joined the cast of FX‘s The Comedians, the hot cable comedy project with Billy Crystal attached to star, co-write and produce. Oberg (30 Rock) plays Mitch, the head writer of the sketch show who’s eager even when he’s being bulldozed by Billy. Weir (Big Day, MADtv) will play Kristen, the anxiety-ridden producer of Billy and Josh’s sketch show, who frequently finds herself caught in the middle of their arguments. Ferguson (Mad Men, Almost Human) takes on the role of Esme, a no-nonsense PA who is mostly over it all, including Billy. Oberg is repped by CAA, Vincent Nastri at Bleeker Street Entertainment, and attorney Mitch Smelkinson; Weir by UTA, Meghan Schumacher Management,and attorney David Fox; Ferguson by CAA and Principato-Young.