American Pie actress Natasha Lyonne turned herself in to a NYC court yesterday. A bench warrant was issued last January after the actress failed to appear for four court hearings on charges of criminal mischief, harrassment and trespassing. Lyonne is also accused of bizarrely threatening to sexually molest a neighbor's dog during a 2004 argument. Lyonne entered rehab in February for an alleged heroin addiction and is still attending out-patient counselling meetings. An NYC judge sentenced the actress to a conditional discharge and promised the charges would be dropped if Lyonne stays out of trouble for six months.