TVLine Items: Chloë Sevigny's New Hit, More Doctor Who Ahead, and Other News to Know

Chloë Sevigny has landed her first major post-Big Love TV gig, and it’s taking her across the pond.

Sevigny has been cast as the lead in Hit and Miss, a provocative new six-episode British series by Shameless creator Paul Abbott, Deadline reports. The actress will play Mia, a transgender contract killer who discovers that in a previous life he fathered several children.

Ready for more of today’s TV dish? Well…

• BBC has ordered 14 additional episodes of the Matt Smith-starring Doctor Who, U.K.’s Guardian confirms. Scheduling on the latest batch of eps remains up in the air, but it’s likely they’ll air in 2012.

Cristián de la Fuente (Private Practice, In Plain Sight) will guest star during the second season of Syfy’s Haven (premiering Friday, July 15). The actor is set to play a “straight-laced, conservative, mild-mannered banker” hiding a dangerous double life.

• First Lady Michelle Obama will play herself in a January episode of Nickelodeon’s iCarly, the Associated Press reports. According to network president Cyma Zarghami, Obama will promote Joining Forces, “an initiative aimed at increasing awareness and support for military families.”

• Fox just announced some tweaks to its summer schedule: Masterchef will soon become a two-night affair, with episodes airing Mondays at 9/8c (beginning June 13) and Tuesdays at 8 pm, until it moves to its new 9 pm slot on July 19; Hell’s Kitchen‘s two-night premiere will be served up on Monday, July 18 and Tuesday, July 19 at 8 pm; and Fox’s newest unscripted reality series, Buried Treasure, begins Wednesday, August 24 at 8 pm.

• On the heels of Extreme Couponing’s success, TLC has ordered High Stakes Sweepers, per TV Guide Magazine. The hour-long pilot will follow people addicted to entering — you guessed it — sweepstakes.

• Encore Westerns will pay tribute to late actor James Arness with a 24-hour Gunsmoke marathon this Saturday, June 11, beginning at “high noon” (aka 12 pm).

• Bravo’s Andy Cohen and E! News co-host Guiliana Rancic will host the 2011 Miss USA Pageant live from Las Vegas on Sunday, June 19 (airing on NBC at 9 pm).

Which TVLine Items have you talking today? Hit the comments!