Reese Witherspoon has officially filed for divorce from estranged husband Ryan Phillippe. TMZ obtained Witherspoon’s divorce petition, in which the actress is asking the court for joint legal custody of the couple’s two children. Reese is asking for primary physical custody. Witherspoon is asking the judge to block any attempt on Phillippe’s part to get spousal support. Reese is asking the judge to allow her "exclusive use of the family residence." As TMZ reported, the couple does not have a prenup, which means earnings during the marriage will be divided 50/50. The couple was married for seven years. They met at Reese’s 21st birthday party. Witherspoon lists the date of separation as October 30, citing "irreconcilable differences."