Mary-Kate Olsen is getting some support from her twin sister.

Ashley Olsen has canceled a trip to Australia to be with Mary-Kate, who's reportedly being treated for an eating disorder. Ashley had planned to attend the Australian premiere of their new movie, "New York Minute."

The head of the Olsen twins' entertainment company said Ashley decided to "be with her family at this time."

Us Weekly and People magazines reported Mary-Kate entered a treatment center because of an eating disorder. Us Weekly said she suffers from anorexia.

Video

Olsen Twin Seeks Treatment

According to "Access Hollywood," Mary-Kate Olsen's publicist Michael Pagnotta issued a statement Tuesday, saying that the actress has "recently entered a treatment facility to seek professional help for a health-related issue. She is thankful for the encouragement and support of her friends and family who are with her every step of the way."

Later, Pagnotta reportedly told "Access Hollywood" that the issue was "eating-related."

Mary-Kate, the brunette half of the Olsen twins, still plans to attend New York University this fall and will be traveling later this summer, according to the statement.

The sisters turned 18 on June 13. They recently graduated from high school and both plan to attend New York University in the fall.

The fraternal twins started in the entertainment business at 9 months old, sharing a role in the hit sitcom "Full House." They've since gone on to create their own home-video and merchandising dynasty.