A certain celebrity couple is sadly not going to live long and prosper together.

Star Trek hottie Chris Pine and model girlfriend Dominique Piek have parted ways, according to E! Onine.

The easy-on-the-eyes pair had been together for about a year, having first made their red-carpet debut as a couple at last May's Cannes Film Festival.

So what went wrong?

"It was a mutual call," reveals a source. "They both needed their space."

As you might imagine, both of them have pretty tight work schedules these days.

"She has been very busy with her modeling work and traveling," the source continues. "He's got Star Trek and his other projects keeping him busy."

It sounds like the break-up wasn't an easy one.

"It's hard for two people at their age and on their level," the insider points out. "They'll both be just fine, though."

Chris got his start opposite Lindsay Lohan in the movie that no one saw, Just My Luck.

His big break came when he landed the role of Captain Kirk in the 2009 film reboot of Star Trek, with the sequel coming out this month. He has also appeared in Unstoppable and This Means War.

Dominique is a model who has appeared in the Sports Illustrated Swimsuit Issue.

In other words, it sounds like we can all set our phasers to sob.

Source: E! Online