EXCLUSIVE: After a decade at Warner Bros TV, writer-producer Rina Mimoun is moving to ABC Studios where she has signed a two-year overall deal. Under the rich seven-figure pact, Mimoun will develop new projects for the studio and join its upcoming series Mistresses as an executive producer. The soap, based on the British format, was recently given a straight-to-series order for a summer 2013 launch. It was written by The Nine co-creator KJ Steinberg, who is executive producing with Bob Sertner, Ecosse Films’ Douglas Rae and now Mimoun. With Steinberg busy working on her ABC/ABC Studios pilot Gilded Lilys, Mimoun and Sertner will oversee day-to-day operations on Mistresses for the time being. Mimoun’s deal with ABC Studios starts in June, but I hear she is been loaned out by Warner Bros TV so that she can start work on Mistresses right away.

Mimoun — who got her start at age 21 with a WGA internship on the Fox comedy Ned And Stacey and a first staff writer job on the UPN sitcom Guys Like Us — scored her big break when then-Dawson’s Creek showrunner Greg Berlanti hired her as a writer on the WB/Sony teen drama. Mimoun then followed Berlanti to Warner Bros TV, where she worked on his WB drama Everwood, rising through the ranks to co-executive producer and showrunner for the final season. UTA-repped Mimoun had been at WBTV ever since, creating the studio’s CW drama series Privileged and working on such existing WBTV series as Gilmore Girls, Pushing Daisies, Eastwick and Hart Of Dixie. Last season, her medical drama script at CBS went to pilot starring Scott Foley. Earlier this season, the two re-teamed to co-write The Escape Artist, a drama script that was set up at CBS.