The 37-year-old actress has played the ditzy lawyer in 'Legally Blonde' and 'Legally Blonde: Red, White and Blonde', but will not be part of the third installment, reported New York Daily News.
Jennifer Coolidge, who played Elle's friend Paulette in the films, said, "That was Reese's choice."
However, despite Witherspoon's reluctance to rejoin forces, Coolidge had nothing but praise for the star, claiming that she made the movie a success.
"She's such a good actress. It was weird, she carried 'Legally Blonde'. She had a baby at home or two babies at home and she was doing Legally Blonde during the day. It was bizarre how much that girl can handle. I was blown away by her," she said.