JoBeth Williams — among the top vote-getters in recent Screen Actors Guild elections — has resigned from SAG’s national board after five years.

Williams has indicated she’s ankling due to time constraints from serving as president of the SAG Foundation and on the SAG Awards Committee. At its most recent meeting, the guild’s Hollywood Division board tapped Jane Austin to fill Williams’ slot until the seat becomes open in next September’s election.

Williams won a three-year term in 2005 when she received the largest number of votes out of 61 Hollywood board candidates. She was part of the Membership First faction, which gained control of the national board for the next three years on the promise of taking an aggressive stand at contract negotiations.

Williams trailed only Amy Brenneman and Adam Arkin in the 2008 election, winning another three-year term. Membership First lost its majority in that contest and saw further erosion in last fall’s contest to a self-styled moderate coalition.

SAG’s national board has 71 slots.