Royal première for Charlie's Angels

The prince with Lucy Liu and Drew Barrymore

Hit movie Charlie's Angels has been given a glitzy UK première in the presence of Prince Charles.

One of its three stars, Cameron Diaz, had to drop out at the last minute due to filming commitments in the US.

But co-stars Drew Barrymore and Lucy Liu were there with the Prince of Wales at the Odeon Leicester Square cinema in the West End of London.

We just had a great time with Prince Charles and we talked about a lot of different things

Lucy Liu

Barrymore was accompanied by her boyfriend, Canadian comedian Tom Green - and the pair tried to steal the show by announcing they had married.

Showing off a diamond engagement ring, Barrymore, 25, told reporters: "We got married on Saturday night."

But it is not the first time the couple have claimed they have married and it is not clear if they have really tied the knot.

Among the guests at the première were actor Sir Michael Caine, pop singer Kylie Minogue, sprinter Linford Christie, Austin Powers actress Heather Graham and designer Donatella Versace.

Charlie's Angels, the movie, is based on the hit 1970s TV series of same name, originally starring Kate Jackson, Farrah Fawcett and Jaclyn Smith.

The show about the glamorous, lip-glossed private detectives working for a mysterious unseen millionaire has acquired a cult following.

Accordingly, the big-screen version has been long-awaited - and heavily-hyped.

Barrymore, Diaz and Liu reprise the roles

It went straight in at number one at the US box office when it opened on 4 November.

It is expected to do the same in the UK when it opens on Friday.

The prince dressed in a black dinner jacket and bow tie for the lavish occasion, and the film's two stars sat either side of him.

On Tuesday, the three had dinner together at St James' Palace.

The prince requested the meeting to thank the actresses personally for allowing their film to have a royal fund-raising première in aid of his Prince's Trust organisation.

At the same time he asked if they would agree to become ambassadors for the trust, set up in 1976 to help disadvantaged young people.

The line-up from the original hit TV show

Speaking at the première, Liu, wearing a flowing fawn sequinned chiffon backless gown by Versace, said she would be delighted to help the Prince's Trust.

"I would love to. I think I will," the Ally McBeal actress declared.

Co-star Barrymore, wearing an oriental-style print smock and black wide-legged trousers, added: "I would be honoured. I want to work hard for it."

Barrymore, star of films including ET and The Wedding Singer, said having dinner with the prince at St James' Palace had been a "dream".

"He was a real gentleman, and charming and a great listener as well as a great conversationalist."

Barrymore with Tom Green - but have they really married?

Liu agreed it had been "an honour" to have dinner with Prince Charles on Tuesday.

"It was a huge thrill for all of us.

"We just had a great time with Prince Charles and we talked about a lot of different things - politics and history and his love of film.

"He's just a wonderful man and we had a lovely time."

The prince returned the compliments outside the auditorium when he told the pair: "You both look very smart."