Action-movie star Arnold Schwarzenegger has become the highest-profile name to join the 230-plus candidates to replace California Gov. Gray Davis.

Schwarzenegger made the announcement that he was running in the Oct. 7 recall election of Davis, a Democrat, at a taping of the

Tonight Show

Wednesday with Jay Leno.

At about the same time, U.S. Sen. Diane Feinstein, one of California's most popular Democrats, said she would not have her name placed on the ballot to replace Davis, should he be recalled.

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Schwarzenegger, a moderate Republican married to Maria Shriver of the Kennedy clan, had been mulling the race, saying he likely would run if his friend, former Los Angeles Mayor Richard Riordan, did not.

Riordan, who lost in the Republican primary in 2002, said Wednesday that he wouldn't be a candidate.

According to the

San Francisco Chronicle

, county clerks reported official interest from 234 candidates as of Wednesday, with another 155 expressing "unofficial" interest.

Among the potential candidates are U.S. Rep. Darrell Issa, a Republican who bankrolled the recall signature drive with $1.7 million of his own money. Republicans are hoping to cash in on voter anger over the mishandling of the 2001 energy crisis and a $38 billion budget deficit to replace Davis in Sacramento.