After Stephanie Pratt opened up for the first time in the new issue of Us Weekly about her secret struggle with bulimia, her older brother Spencer Pratt tells she is in his prayers.

"I love and support Stephanie," Spencer tells "We all have our problems from time to time, but she's my sister and I'm always praying for her."

The 23-year-old Hills star revealed that she began bingeing and purging after watching a scene she shot with Lauren Conrad in 2007 after first joining the cast. She also blamed many of her insecurities on being compared to her villainous brother. (She was nicknamed She-Pratt on the MTV show.)

See photos of scary-skinny stars.

"So many people hated me just for being related to Spencer," she told Us. "I started eating my emotions."