'Stranger Things' Star David Harbour Splits From Alison Sudol

Much like his Stranger Things character Jim Hopper, actor David Harbour seems to be having a tough time in his romantic life.

A source confirmed to Us Weekly this week that Harbour and his girlfriend, Fantastic Beasts and Where to Find Them star Alison Sudol, have split after dating for over a year and a half.

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such a fun night at the #Hellboy special screening last night (which was even better the second time around- comes out on Friday go seeeee it!! very proud of @dkharbour) this dress was a dream, thank you @leithclark and @maisonvalentino ♥️♥️♥️ and the magic worker @charlierathbonehair on both hair and makeup ? ✨✨✨✨✨✨✨✨✨✨✨ *** FYI THAT’S A FOLD IN MY DRESS

A post shared by alison sudol (@alisonsudol) on Apr 10, 2019 at 9:19am PDT

Harbour, 44, and Sudol, 34, were first spotted together in Jan. 2018 after the BAFTA Tea Party, snuggling up together and walking arm and arm.

It is unclear what sparked the breakup, as the two seemed very much in love. Just in April, Sudol had posted a picture of Harbour for his birthday below with a heartfelt caption.

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ok so I did a lovey dovey post on valentine’s day and too much public squishiness makes both of us feel funny. so I’ll contain myself... but it’s this guy’s birthday, and all I’ve got to say is, I’m really, really glad you were born, @dkharbour - you really are the all of it ♥️ ♥️ ♥️

A post shared by alison sudol (@alisonsudol) on Apr 10, 2019 at 10:47am PDT

Us Weekly also reports that the breakup apparently happened about a month ago. The Hellboy actor has since been spotted in London with singer Lily Allen.

Neither Harbour nor Sudol have spoken out about the breakup.