Silverman calls Sheen's fellow ex "very cruel" after she sent her this breakup gift.
"Been ending every night with a microwaved bowl of personalized m&ms given to me by the very thoughtful and very cruel Kate Beckinsale to remind me that I'm alone in this world," Silverman wrote on Instagram, alongside with a photo of the blue and white candy stamped with the former couple's faces. "So very alone. THANKS KATE."
"Seriously they are so good, especially melted, which is why the microwave," Silverman added.
Even though the two have been separated for over a month, Sarah didn't confirm the news until Monday.
"The great Michael Sheen and I consciously uncoupled over Christmas. I mean, not 'over Christmas' -- like that wasn't the fight that ended it. No fight. We just live in different countries and it got hard," she tweeted. "Felt we should just tell y'all so you stop askin', 'How's Michael/How's Sarah?'"
Sheen, who is based in the U.K., and Silverman were together for about four years. The former couple met on the set of Showtime's "Master of Sex."
During their relationship, Silverman became close friends Beckinsale, who shares a daughter named Lily with Sheen.
"I really love [Silverman] as well, and we are really lucky that we both get on, and Lily gets on great with her," Beckinsale once said in an interview with ES Magazine. "Having as many strong females in your teenage daughter's life as possible is a good thing."