Baywatch star Jeremy Jackson was kicked off Celebrity Big Brother just three days in for pulling glamour model Chloe Goodman's bathrobe open.
The Channel 5 show said it had taken action after the "explosive drama" between the housemates.
Former Page 3 girl Goodman, 21, claimed that Jackson had drunkenly tried to look at her breasts while the two were alone in the toilet.
Sobbing, she told the housemates: "I was helping him and he went to my dressing grown top and put my boob out."
The alleged incident, which was not shown on camera, came after Goodman went to Jackson's assistance as he vomited after mixing rum and vodka.
Jackson at first defended himself saying that he had not groped her body and that he did not think she was naked under the robe.
"She tried to make a pass at me and I grabbed the tip of the robe to see if she was naked," he told housemates.
Later he apologised but insisted that he had not ripped open the robe in an aggressive way.
"Believe it or not I'm being silly, I'm too emotionally wounded to really even gauge any real relationship-type flirtation or pass at a woman anyway right now - I'm just not that guy," he said
Big Brother initially arranged for Jackson to sleep in a separate area, but decided to remove him the following day for his "wholly unacceptable" behaviour.
Concerns had already been raised among the contestants over the 34-year-old American's erratic behaviour.
Celebrity blogger Perez Hilton had commented that his countryman was not "mentally stable" and described him as "borderline scary".
Jackson, who played the son of David Hasselhoff's character Mitch Buchannon on Baywatch, is well-known for his troubled personal life.
He was arrested in 2000 for manufacturing methamphetamines and has been to rehab five times.
Meanwhile, former Coronation Street star Ken Morley was given a formal warning for using "unacceptable language" after he called R&B singer Alexander O'Neal a "negro".
O'Neal responded angrily, telling Morley: "I'm just giving you some information - it's just black, we don't use negro any more."
Morley was also pulled up for saying that the bathroom was "the best place to look at women's arses in the world".
The 71-year-old warned Goodman not to mess with Jackson because he is a "Jewish film producer" and called Perez an "irrelevant American neurotic".
Jackson's ejection saw bookies face hefty pay-outs to punters who had put money on a 3/1 price for a Celebrity Big Brother eviction this year.
Betting firm Coral said that TV personality Keith Chegwin remains the 11-4 favourite with Coral to win the show this year.
Controversial columnist Katie Hopkins is now the 3/1 second favourite - down from her opening price of 20/1.
Coral spokesman John Hill said: "Jeremy's ejection from the house has given a lot of punters an early pay-out on the show.
"We always offer a number of specials in Big Brother and one of them this year was an ejection.
"Although this was always likely with the group of celebrities involved, we did not expect to be paying out so early in the series."
Three housemates are currently facing eviction from the house after celebrities had to cast their first nominations face to face.
Morley received seven nominations and joined American soul singer O'Neal and Goodman.
O'Neal and Goodman had already been put up to the public vote by controversial columnist and fellow contestant Katie Hopkins.
In a twist, contestants had to give their nomination in front of their fellow housemates.
A celebrity will be booted out of the house on Tuesday following the public vote.