A celebrity fashion designer already facing charges in three sexual assaults has been accused of assault by four more people, and prosecutors added 13 new counts Monday.

Anand Jon Alexander, 33, has been in jail in lieu of $1.3 million bail since March 6. His arraignment was scheduled for April 4. His attorney, Ronald Richards, has denied the allegations.

The Indian-born designer was arrested at his Beverly Hills apartment after a woman accused him of raping her. Authorities said additional evidence led them to the other suspected victims, including a teenage girl.

Along with forcible rape, lewd acts on a child and other felony counts, prosecutors have charged a special circumstance allegation of multiple victims. If convicted, Alexander could face life in prison.

Considered an up-and-coming designer, Alexander launched his fashion line in 1999 after graduating from the Parsons School of Design in New York. He has dressed celebrities including Paris Hilton, Michelle Rodriguez and Mary J. Blige.

This year, Newsweek named Alexander a person to watch. He has also made several appearances on "America's Next Top Model."