CELEBRITY

Liberty Ross Files For Divorce From Rupert Sanders Following Kristen Stewart Affair

LOS ANGELES, CA - MAY 29:  Actress Liberty Ross (L) and her husband director Rupert Sanders arrive at a screening of Universa
LOS ANGELES, CA - MAY 29: Actress Liberty Ross (L) and her husband director Rupert Sanders arrive at a screening of Universal Pictures' 'Snow White and The Huntsman' at the Village Theatre on May 29, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Liberty Ross has filed for divorce from her cheating hubby Rupert Sanders ... TMZ has learned.

Ross just filed her paperwork in L.A. County Superior Court.  She's asking for joint custody of their 2 children -- ages 5 and 7. 

Ross, who is repped by disso-queen Laura Wasser, is also asking for spousal support, as well as attorney's fees.

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