Reese Witherspoon married Hollywood agent Jim Toth on Saturday in a ceremony at her sprawling ranch in Ojai, CA, according to People, and ET has exclusive details on the ceremony.

About 100 of Resse and Jim's closest family and friends -- reportedly including Renee Zellweger -- are expected to attend the wedding. Guests began arriving around 3 p.m. but secrecy made it difficult to identify celebrities. Matthew McConaughey and Camila Alves were reportedly among the attendees, spotted arriving in a white SUV.

ET can confirm that Reese's mom Betty was spotted having coffee by herself this morning at the Oak Cafe at Ojai Valley Inn and Spa -- where all the wedding guests are reportedly staying -- and was picked up by a golf cart and taken to her room.

Shuttles were seen in the area ready to transport guests from the Valley Inn and Spa to Reese's property. Actor Tobey Maguire was also spotted arriving at the hotel with his wife Jennifer. One of the star's neighbors told ET the wedding had to be moved from the back of the house to the front because recent rain left the back too muddy. 

A rep for the 'Legally Blonde" star confirmed her engagement to Jim last December, saying at the time the couple was "extremely happy." Following her split from boyfriend Jake Gyllenhaal, Reese reportedly began dating Jim in January 2010, then went public with their romance a few months later.

Reese was previously married to Ryan Phillippe, but the two divorced in 2008 after seven years together. They share two children, Ava and Deacon.

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