Love on the Set: Celebrity couples find real romance off camera

(Sony Pictures)
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Reese Witherspoon & Ryan Phillippe

Set Where They Met: "Cruel Intentions," in which his character tries to seduce her character. They actually met at a party before filming.

Relationship Status: Divorced after eight years of marriage. They have a daughter, Ava, and son, Deacon, together.

Repeat Offender(s): Post-divorce, Witherspoon later dated her "Rendition" co-star Jake Gyllenhaal (and then they broke up), while Phillippe was seeing Australian actress Abbie Cornish, whom he met on "Stop-Loss." She was supposedly the "other woman" who wrecked his marriage.