Rumer Willis thinks her younger sister is "very gutsy" for walking around New York City topless earlier this year.

The 'There's Always Woodstock' star said: "She didn't tell me she was doing it beforehand. But my sister Scout is very gutsy. She's probably one of the most brave and outspoken people that I know. I commend her for finding something and taking a stand."

She also told Elle.com: "I like that my sister did that [because] you have to be accepting of who you are and what you have going on."

Scout told her followers at the time that she was boycotting the photo-sharing site after it removed one of her photos - of a sweatshirt she designed, The Babe Bomber, featuring two topless women - for violating its community guidelines.

While she has her older sister's support, a source previously claimed 'Diehard' star Bruce, who also has daughters, Tallulah, 20, with Demi, as well as Mabel, two, and three-week old Evelyn with wife Emma Heming-Willis, was very upset about her topless protest.

The actor was also previously said to have been "mortified" after he saw pictures of Rumer showing a lot of skin at a red carpet event.

Another insider said: "Bruce was mortified. As every knows, he's actually a very conservative guy and doesn't like to see his daughter parading around in next to nothing."