"Fifty Shades of Grey" actress Dakota Johnson wowed in the red carpet as she wore a plunging cream Saint Laurent gown during the London premiere at Odeon Leicester Square on Thursday.

She accessorized her look with just a small clutch bag and added a splash of color with a bright red lipstick, said Daily Mail.

Dakota Johnson earlier told Access Hollywood that the sex scenes in "Fifty Shades of Grey" are tastefully done.

'The virginity scene I think is something that is so beautiful, and the way that [cinematographer] Seamus [McGarvey] and [director] Sam [Taylor-Johnson] shot that scene - it's really incredible," she said.

"And the colors!" Dakota Johnson added. "It's so saturated and then, just watching a really profound moment in a young girl's life. I think that was pretty special to do."

Despite being tastefully done, the model nevertheless forbade her parents to watch "Fifty Shades of Grey," even if it's her first film.

Melanie Griffith earlier told TMZ that she's not watching the film, based on the novels by E.L. James, at the request of her daughter. The model's father, Don Johnson, also has no interest in watching "Fifty Shades of Grey" but only because he doesn't like the genre.

It was said that the movie has 20 minutes worth of sex scenes.

Dakota Johnson's co-star Jamie Dornan, meanwhile, wore a black suit and brown necktie as he attended the red carpet event alongside wife Amelia Warner, who wore a orange and blue little dress.

According to Jamie Dornan, his wife won't be watching "Fifty Shades of Grey" because of its racy content.

"She wants to support me and my work. I won't be able to sit there myself. I am not going to put any pressure on her either way," he said. "It's her decision. She's well aware that it's pretend, but it's probably not that comfortable to watch."