Lachey is set to play a baseball star navigating a new marriage in a pilot for the WB network, spokesman Paul McGuire said Monday. Danny Jacobson, co-creator of "Mad About You," has been tapped to write the show.
"Nick is a huge talent with a major following and Danny is a brilliant, seasoned comedy writer," McGuire said. "We hope it's a good match."
Shooting of the half-hour pilot will begin in April. The show will be considered for the network's fall 2006 lineup, McGuire said.
Simpson, 25, and Lachey, 32, jointly announced their separation on Nov. 23, saying they had decided to part ways after three years of marriage. The couple had their own reality show, "Newlyweds: Nick & Jessica," on MTV.