Lily Allen attempted suicide as a teenager.

The 24-year-old singer was committed after she was left so distraught by the breakdown of her first romance that she tried to “slit her wrists,” the 24-year-old singing star’s half-sister has revealed to a British tabloid.

“Aged 18, she tried to slit her wrists when her first relationship ended and she ended up in The Priory rehab clinic for four weeks,” Sarah Owen, 29, who shares the same mother with Lily said in an interview with Grazia Magazine this week.

“I had a big gang of friends but Lily was more of a loner. She had no-one to talk to about getting her first period or breaking up with her first boyfriend.

“Would it have been different if we’d been closer? Probably,” Sarah says.