Celebrity publicist Max Clifford used his closeness to some of the world's biggest stars to "bully" teenage girls into performing sex acts on him, a London court has heard. Clifford, whose most famous clients have included Frank Sinatra, Marlon Brando, Muhammad Ali, and Simon Cowell, is accused of assaulting seven young females aged between 14 and 19. It is alleged he seduced them by bragging of his closeness to celebrities before committing sex attacks on them during a string of incidents dating back to the mid-1960s. One woman claims she was 14 years old when Clifford, then aged in his 20s, groped her in his car after telling her, "If you want to see the stars, this is what you have got to do." The jury at London's Southwark Crown Court was told another alleged victim, who claims she was abused by Clifford at the age of 15 after meeting him during a trip to Spain, wrote him a letter 35 years after the attack, in which she stated, "You took pleasure in degrading me... You abused me, you hurt me, upset me, and you are a vile and horrible man." It was also alleged Clifford flattered young women by claiming he could land them roles in a Bond movie or on U.S. TV, and would later phone them pretending to be Hollywood moguls such as producer Aaron Spelling or director Michael Winner. Prosecutor Rosina Cottage, QC, told the jury Clifford treated his company offices as his "own sexual fiefdom" and said, "The defendant used his contact with famous people to bully and manipulate these young people into sexual acts with him... As the years went by, he got away with his behaviour, he must have thought he was untouchable and no doubt thought no one would complain and, if they did, they would not be believed... "This evidence shows that the defendant would not care about age and the propriety of his behaviour. He had no fear of using the names of famous directors and producers who he may never even have met, let alone have any business dealings with." Clifford, of Surrey, England, denies 11 charges of indecent assault between 1966 and 1984. The trial continues.