Hold Up, Are Rachel Bilson and Bill Hader a Couple?

This year saw its fair share of unexpected celebrity couples — Kate Beckinsale and Pete Davidson, Miley Cyrus and Cody Simpson, Demi Lovato and The Bachelor's Mike Johnson just to name a few. But nothing could have prepared us for the reported, odd pairing of Rachel Bilson and Bill Hader.

Over the weekend, the two actors sparked dating rumors when they were spotted grabbing coffee together in Tulsa, OK (Hader's hometown), and, according to TMZ, eyewitnesses at the local Starbucks revealed that Bill's family joined them, meaning that Rachel has already met the parents.

<p>David Buchan/Shutterstock</p>

David Buchan/Shutterstock

The pair's romantic history reportedly spans all the way back to November, after Us Weekly announced they went on a dinner date in Los Angeles. However, neither Bilson nor Hader have confirmed they're a couple — at least not yet.

As for their past relationships, Hader was married to director Maggie Carey (she directed the movie The To Do List, in which Bill and Rachel co-starred) for 11 years before they officially called it quits in 2017.

RELATED: Take a Tour of Rachel Bilson's $3.25 Million Post-Breakup Pad

Meanwhile, Bilson split from Hayden Christensen two years ago after a decade of dating, and, most recently, she was linked to Nick Viall following an appearance on his podcast during the summer. But when asked if they were seeing each other, Rachel kept mum on the topic, saying: "I don't want to talk about it."

Nick was also just as coy, revealing that he's “not really defining any relationships these days.”

So, considering Rachel likes to keep her private life, well, private, it may take some time to get to the bottom of this one.