Duo would join Carell, Knightley in Mandate pic

“Captain America” thesp Derek Luke and Lindsay Sloane are in negotiations to join Mandate Pictures’ “Seeking a Friend at the End of the World.”

Mandate had no comment on the castings.

Steve Carell and Keira Knightley star as neighbors who embark on a road trip to find the former’s high school sweetheart before an incoming asteroid ends all life on Earth.

As first reported by Variety, “CSI” alum William Petersen, Adam Brody and Rob Corddry are also in various stages of negotiations to join the pic, which Lorene Scafaria (“Nick and Norah’s Infinite Playlist”) is directing from her own original screenplay.

Luke is in talks to play Knightley’s ex-boyfriend, a military man preparing to ride out the end of the world in his bomb shelter with friends and family. Sloane will play a friendly waitress who is rolling on Ecstasy as doomsday approaches.

Mandate and Indian Paintbrush are co-financing the picture, which is slated to start production later this month. Anonymous Content’s Steve Golin and Joy Gorman will produce with Steven Rales and Mark Roybal of Indian Paintbrush. Mandate’s Nathan Kahane and Nicole Brown will exec produce.

Luke will soon be seen as Gabe Jones in “Captain America,” a role he’ll reprise in “Marvel’s The Avengers.”

Sloane recently appeared in the comedies “She’s Out of My League” and “The Other Guys.” Thesp will be seen in the New Line comedy “Horrible Bosses” this summer.

Luke is repped by WME, while Gersh and Thruline Entertainment rep Sloane.

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