Will exes collide? On the very day that Reese Witherspoon in set to marry talent agent Jim Toth, Breaking Celebrity News found her ex-husband Ryan Phillippe with his girlfriend Amanda Seyfried at a lavish resort just a short drive away from where the nuptials will take place.

Phillippe and Seyfried are staying -- with their dogs -- at the ultra-exclusive San Ysidro Ranch just outside Santa Barbara, CA.  Reese and Jim will wed Saturday night at her home 30 minutes away in Ojai, and her guests are all staying at the equally posh Ojai Valley Inn & Spa.

Reese and Ryan, who finalized their divorce in October, 2007, are parents to daughter Ava, 11, and son Deacon 7. Both children are with their mother and will be participating in her wedding, Breaking Celebrity News has learned.

Ryan, 3