Actor Chris Pine is single again after splitting from model Dominique Piek, according to a U.S. report. The Star Trek hunk began dating the Sports Illustrated beauty in 2011, and they made their red carpet debut at the Cannes Film Festival in France last May (12). However, their romance has ended and the couple has called it quits. A source tells UsMagazine.com, "It happened a while ago. It was a mutual call. They both needed their space. She has been very busy with her modelling work and travelling. He's got Star Trek and his other projects keeping him busy." Pine has previously been linked to actresses Beau Garrett and Olivia Munn and U.S. reality star Audrina Patridge, while the 27-year-old South African stunner broke up with American baseball player C.J. Wilson in 2010.