Lindsay Lohan's estranged half-sister Ashley Horn has spent $25,000 having plastic surgery to look like the actress.

The 18-year-old teen - who was fathered by Michael Lohan when he was still married to Lindsay's mother - landed a revealing interview deal In Touch Weekly magazine, in which she revealed the extreme measures she took to look like her famous sister.

Ashley recently underwent five surgical procedures, including a nose job, cheek fillers, jawline surgery and fat injections in order to become a clone of the 'Mean Girls' actress in her heyday, and hopes to launch her own film career off the back of it.

She told the magazine: ''My goal was to look like Lindsay in her good days, when she was around 18, 19 years old. I'm hotter than Lindsay! I have no problem saying that.''

However, her father Michael - who has cut off all contact with Ashley and her mother Kristi - has branded her behaviour ''sick and stalkerish'', claiming the troubled teen is trying to use his family to become famous.

He ranted to the New York Daily News: ''It's nuts and sick and stalkerish. What mother would let her 18-year-old daughter get surgery like that? And [saying] she's hotter than Lindsay? Are you kidding me? Lindsay doesn't need plastic surgery.

''They wanted to meet the girls [Lindsay and Ali, Michael and Dina's other daughter]. Of course Ashley tells people she's Lindsay's sister. Kristi asks, 'Can we get the girls together in New York?'

''Why not my sons, too? It's just the girls because they're celebs. Now her chances are gone. Lindsay doesn't want to meet her at this point.''