02/09/2012 at 02:00 PM EST
Parminder Nagra is ending her marriage.
actress – who formerly starred on ER
– filed for divorce on Feb. 1 from celebrity photographer James Stenson, according to court documents filed in the Superior Court of Los Angeles.
The couple dated for seven years before they tied the knot
in Hollywood almost exactly three years ago.
Citing irreconcilable differences, Nagra, 36, seeks joint legal custody over the couple's 2½-year-old son
Kai David Singh Stenson, but would like sole physical custody, with visitation rights granted to her ex.– Dahvi Shira