Rumer Willis' Sister Sends Her the Cutest Birthday Message - Watch Now!

Rumer Willis stops by Cartier for a little birthday shopping on Sunday (August 16) in Los Angeles.

The Dancing with the Stars winner turned 27 years old that day – happy belated birthday, Rumer! We hope you had an amazing day.

“Best Birthday Message Ever courtesy of my beautiful sister Mabel” Rumer wrote on her Instagram – see the message below!

Earlier in the week, Rumer was seen out and about at the Chateau Marmont. Also seen out at the celeb hotspot that night was Ashley Madekwe.

25+ pics inside of Rumer Willis out and about on her big day…