Sarah Silverman emailed her late mother to tell her about her Screen Actors Guild nomination.

Sarah Silverman

Sarah Silverman

The 45-year-old actress has been nominated in the Best Actress category for her role in 'I Smile Back' and admitted the first person she wanted to tell was her beloved mother, Beth Ann O'Hara, who died in August at the age of 73.

She said: "I didn't tell anybody. You learn early in Hollywood not to share your wares or brag. My mom died in August, but I email her good news, so I emailed her. On my birthday I wrote her a really long email and today, I found a picture of the list of names, the five [actress'] names and I sent her the picture and I said, 'I got nominated! And I miss you,' it's so corny."

And Sarah admitted she was so shocked by her nomination, she thought someone had died when her manager called her early in the morning to tell her.

She told PEOPLE: "I answered the phone and she was sobbing. I thought somebody died. I didn't know these were being announced.

"I worked so hard in therapy to not let my self-esteem be defined by outside sources but I've just been letting myself feel really nice from it. I'm totally shocked. I'm not trying to be humble. Everyone who works with me is shocked, it's so lovely, it was unexpected and I'm really letting it make me feel great."