Credit: Eamonn M. McCormack/Getty Images for WTA Photo: Mischa Barton at the WTA Pre-Wimbledon Party, June 19, 2014

We've been eagerly awaiting Mischa Barton's comeback since The O.C. killed Marissa Cooper, but this moment in the spotlight isn't exactly a career resurgence. Mischa, who faced a ton of tabloid scrutiny for gaining weight after playing the waiflike Marissa, is taking a page from the Snooki handbook and shilling for a diet pill.  

Mischa, who last made headlines for owing $100,000 in back payments on her Beverly Hills home, tells Daily Mail that she's "lost around four pounds a week by taking the supplement," Proactol XS. The pill itself contains chitosan, an ingredient employed by a few "natural" diet pills including Natural Max, GNC Total Lean, and Terbinex.

The Daily Mail exclusive on Mischa's spokeswomanship shows a bunch of photos of Mischa having a fun tug-of-war exercise sesh. The cardio might contribute to that weight loss, especially since evidence of weight loss from chitosan ispretty inconclusive so far, unless you are a literal guinea pig. That said, it has been used successfully to treat certain symptoms in dialysis patients, aid treatment of periodontitis, and to support tissue rebuilding after plastic surgery.

Despite the questionable new gig, we have our eyes on Mischa, who has multiple film projects on the docket for 2014 and early 2015, including a war mystery in Russia co-starring John Cusack and a thriller starring Danny Glover. So, overall, she doesn't seem to be doing too badly. (And for the record, we think she's beautiful whatever her size.)

What do you think of Marissa's new gig? Hit the comments and let us know!