The Most Surprising New Celebrity Couples of 2018

The longtime friends and rumoured past lovers found their way back to one another in a big, big way: engaged!

Admittedly, they are two genetically blessed individuals, but as a couple, they might be the bizarro match of the year.

In a few short weeks, Ari and Pete have gone from rebounds to full-blown love, matching tattoos, an engagement and moving in together. If that's not fast, we don't know what is.

RELATED: If things come to an end for them, which we hope doesn't happen, it better not happen this way.

The two attended a Backstreet Boys concert together, igniting rumours that they were an item, which they of course denied. Fast-forward to now and they're still hanging out. We want it that way!

Katherine's mom, Maria Shriver, reportedly played matchmaker for her eldest daughter and the Marvel and Jurassic star, who waited a year to start dating since his divorce from Anna Faris. Not sure what's more baffling — that these two could be a thing or that Shriver knows Pratt.

OK, this one isn't super-shocking; it's more just weird seeing Josh with someone other than Fergie. That being said, Duhamel and Gonzalez reportedly met at a Super Bowl party, then did what most guys do: asked a mutual friend to hook him up with Eiza's number.

The least showy member of the reality show family, Kendall's relationships are always rumoured, never confirmed. The latest is NBAer Simmons, whom she was seen cuddling with during Khloe's 4th of July party.

The model and reality show judge split from longtime boyfriend Vito Schnabel in 2017 and was seen earlier this year with Tokio Hotel guitarist Kaulitz. They made their relationship red carpet official in Cannes.

Schnabel wasn't mourning the loss of Klum for too long; rumour has it he's been dating Heard since May.

The SpaceX founder and musician made their public debut on the red carpet of the Met Gala, having met online a month earlier after bonding over a joke about artificial intelligence.

Hermione Granger and Sam Evans not only went public in 2018 but they also broke up then reconciled too. Dreams do come true.

The couple, who were first spotted together on Valentine's Day, met while filming the now-cancelled Life Sentence so at least some good came from it.

Eight years after they first dated in 2010 (this photo from them is everything), Audrina and Ryan are back on. Aw.

The actor split from his Mr. Robot co-star Portia Doubleday in 2017 and has since moved on with Boynton, whom he met while they filmed Bohemian Rhapsody.

The country singer went from Blake Shelton to Anderson East to current beau Felker, who toured with Lambert for a few days with his band, Turnpike Troubadours, then reportedly left his wife to stay with Miranda.

RELATED: The most scandalous celebrity love triangles ever.

The couple's romance made headlines from the start, after claims that she ruined his marriage. But both the actress and realtor denied the homewrecker rumours and later gushed about her first boyfriend since Robin Thicke on Live! With Kelly and Ryan, saying, "I'm in love. When you know you know."

The actress and YouTube star went public with their romance in June and when someone dared question their relationship, Bennet was quick to defend her man.

The actor has always kept his personal life private but when he was spotted walking through Heathrow with Wallis, people wonder what was up. Well, they are and seems like they're still a thing.

Since her split from director Darren Aronofsky in November, she has moved on with Maroney, a director at a NYC gallery. A civilian! Always a breath of fresh air.

OK, nothing's been confirmed but the evidence is pretty much stacked against them — in spite of sources claiming they're "just friends." Just hit a red carpet together already.