Rumer Willis has reportedly been left devastated after splitting from her actor boyfriend Micah Alberti after the pair decided it ''wasn't working''.
The separation was supposedly very sudden and left the 22-year-old star inconsolable.
The couple first went public with their relationship at the premiere of her movie 'The House Bunny' in 2008 and had appeared as a fixture on the Hollywood scene ever since.
A source told People: "They decided it wasn't working. They're moving on."
While a friend of the duo added to Life and Style magazine: "She is very upset.
"She went to Las Vegas this past weekend with a few friends to try to cheer up and have fun, but she's very sensitive about the break-up."
Rumer was spotted partying last weekend at top nightspot Tao in Las Vegas with 'Glee' star Mark Salling and his actor friend Chord Overstreet in a bid to get over Micah.
And at one point, the pretty brunette and Chord flirted on the dancefloor.
An onlooker added to People: "Rumer was bouncing around the club having a great time just dancing. Chord was flirtatious with Rumer. They had a lot of fun."
US soap star Micah - who starred in hit shows 'All My Children' and 'One Life To Live' - appeared to have been accepted by Rumer's family, often appearing with his girlfriend and her mother Demi and her stepfather Ashton Kutcher on the red carpet at movie premieres.