Kristen Wiig and Fabrizio Moretti have broken up. Credit: Jonathan Leibson/WireImage; Joe Kohen/WireImage

It's officially over! Kristen Wiig and Fabrizio Moretti have called it quits after 18 months of dating, multiple sources exclusively confirm to Us Weekly. The Bridesmaids star, 39, and the Strokes drummer, 33, were first linked in December 2011 after they were spotted making out at a Black Keys' concert in New York City.

"It was very amicable and they will remain friends," an insider says of the  former couple's breakup.

Wiig has typically been tight-lipped about her personal life, though she did credit the rocker with enriching her life in an August 2012 Marie Claire cover story. "I'm happier than I've ever been and I feel very lucky right now," she told the magazine.

It's been a busy summer for the former Saturday Night Live standout: Wiig leant her voice to the No. 1 animated feature Despicable Me 2 and starred in the dramedy Girl Most Likely, both released in July. Moretti, who dated Drew Barrymore from 2002 to 2007, is celebrating the release of The Strokes' fifth studio album, Comedown Machine.