Yep. The same Derek Hough who we were meant to believe was dating Cheryl a few years back in THE most unconvincing fauxmance ever.
The Bride Wars actress - who has three-year-old Bingham with the Muse frontman - has called off their engagement but are still "close friends".
Her representative told PEOPLE.com: "Kate and Matt have been separated for some time now. Despite this, they remain very close friends and committed co-parents." That would explain Matt's absence during the best thanksgiving dance war ever, and why Julianne Hough was there...
— JustJared.com (@JustJared) December 9, 2014
The pair had been engaged since April 2011, something which Kate - who has Ryder, 10 from her previous marriage to Chris Robinson - didn't seem to mind, which makes sense now.
She previously shared: "My parents aren't married. And one of the reasons why they never got married is because they had been married before and they liked it the way it was. They didn't feel like they needed a piece of paper to be committed. So for me, I know that marriage is not a golden ticket."
Recently, Kate admitted that the couple were 'basically married' and in no rush to plan a wedding: "I'm not in a rush. We are basically married. It's really about when are we going to take the time to plan a wedding. [I'm not wearing my engagement ring] because it can be... a little much. I like to wear my push gift [another ring] for pushing out Bing."
As for the rumoured Derek Hough romance, according to Just Jared, they've been seen eating together. Oh, and they've enjoyed a bit of a dance, with Kate saying to Shape magazine last year: "My heart is really in contemporary jazz, but lately I’ve been ballroom dancing with Derek Hough... It’s been a real blast."