Bruce Willis' daughter Tallulah Willis reportedly quietly checked into rehab in July for cocaine and alcohol abuse.

According to Star Magazine, Tallulah checked into the Wickenburg, Arizona facility The Meadows on July 23. A source said that her mother, Demi Moore, is struggling with guilt over the situation with her daughter.

"Demi feels so much guilt over Tallulah spinning out of control like she did," the source claims. "It's like she's living past experiences all over again. But she's trying to be strong for her daughter."

Tallulah's father discovered the drug abuse after older sister Scout stumbled upon her sister allegedly snorting cocaine at a Hollywood party back in May. She then admitted to her mother in June that she was struggling with addiction and Demi told her to enter rehab.

"She knew her daughter needed her," the source said and noted Demi tried not to be judgmental of the situation. She "was glad she could be there to help."

Recently, Tallulah participated in a body image campaign with StyleLikeU as the 20-year-old has struggled with body dysmorphia ever since she was 13.

image courtesy of INFevents.com