Britney Spears is in talks to star in an upcoming film, Memoirs of a Medicated Child. The troubled former music icon has been tapped for the role of the loyal girlfriend of a misdiagnosed mental patient.

“A letter of intent from Britney was received very recently,” a spy tells a Page Six insider. “Lindsay Lohan was originally offered the part because they thought she’d be a better actor, but they changed their mind and wanted Britney instead.”

“They think she’d be better in the role,” adds the source. The film is based on the true story of Mark Black, a man who was wrongfully dosed, imprisoned and then saved by John Gotti (seriously). Brit will star opposite Ross Tyler, who is playing the title character, Mark Black, according to the insider. Peter Iacanagelo will star as John Gotti, while fellow train wreck Andy Dick will join Brit Brit in the biopic.

“I think it’s pretty unbelievable considering what the script is about
– prescription drug use, ADHD meds, and all that — considering what Britney’s been through,” said the NY Post source. “Everyone’s very excited to have her join the cast.”