Rumer Willis 'turns 21 in Las Vegas'

Rumer Willis turned 21 by celebrating her birthday in Las Vegas, it has emerged.

The actress daughter of Bruce Willis and Demi Moore partied at restaurant Tao at the stroke of midnight with her famous parents, stepfather Ashton Kutcher and celebrity revellers such as Hills star Audrina Patridge, People reports.

"Getting to come here is pretty amazing," she told reporters prior to entering her bash, in which she was reportedly serenaded by an Elvis Presley impersonator who sang 'Happy Birthday'.

Willis will next star in Sorority Row, an upcoming horror film remake, while she will also take on a guest starring role as a "punky cute lesbian" on The CW's 90210.