Betty White reacts to the news that her costar from 'The Proposal' Sandra Bullock has filed for divorce.

"I love her dearly," White tells ET of Bullock. "Her personal life is her business -- certainly not mine or anybody else's."

Bullock filed for divorce from husband Jesse James after it was reported that James allegedly had numerous extramarital affairs. In addition to filing for divorce, the Oscar winner also announced to People magazine that she has adopted a baby boy, 3 ½ month old Louis Bardo Bullock.

Meanwhile, White will debut as the host of "Saturday Night Live" on Mother's Day weekend, May 8.

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