Snitching sources at the National Enquirer claim that “Cruel Intentions” actress Selma Blair checked in for a secret stint at Promises Rehab Center back in March.

The tattle, an alleged friend of Selma’s, says she has long struggled with substance abuse, but has become a heavier user since her split with hubby Ahmet Zappa in 2006:

“She embraced what she learned at Promises and distinguished herself as a model patient,” the friend says.