BEIJING, March 28 (Xinhuanet) -- U.S. Oscar winner Reese Witherspoon formally married her entertainment agent Jim Toth, according to media reports Sunday.

Witherspoon, 35, and Toth, 40, held their 20-minute wedding ceremony Saturday at a six-acre ranch in front of 120 guests in Ojai, California.

Wedding guests included A-list stars like Robert Downey Jr., Scarlett Johansson, Tobey Maguire and Renee Zellweger.

Witherspoon's best friend Heather Rosenfield acted as her maid of honor.

Ava, 11, and Deacon, 7, her kids (with ex-husband Ryan Phillippe) were also reported to have participated in their mother's ceremony. Witherspoon ended her seven-year marriage to Phillippe in 2007.

Witherspoon wore a custom-made Monique Lhuillier gown and a wedding band designed by William Goldberg, who also created her four-carat 250,000 U.S. dollar diamond engagement ring.

She was engaged to Toth in December after dating with him for eleven months.

Witherspoon won the best actress Academy Award for her excellent performance in "Walk the Line" and scored box office hits with her "Legally Blonde" movies.