• The Map That Leads to You star Madelyn Cline is reportedly dating Prince Constantine-Alexios of Greece and Denmark.
  • The pair was spotted kissing and packing on PDA in New York City, which sparked dating rumors and tips from DeuxMoi readers.
  • Here’s what we know about Prince Constantine-Alexios.

Madelyn Cline might be in her royal romance era. Over the weekend of September 20, bystanders were quick to send tips to DeuxMoi, which kicked off romance rumors between the I Know What You Did Last Summer actor and Constantine-Alexios.

“Just saw Madelyn Cline with Prince of Greece on Madison Ave,” one tip read, adding, “They were like giggling and in sweats.”

The dating rumors were further fueled by an alleged video of Madelyn kissing the Prince that was sent to DeuxMoi. According to the outlet, she’s wearing a unique pair of AirPod Max headphones in the above clip, which she also wore in a TikTok posted on September 6.

Constantine-Alexios then posted a photo of (what seems to be) Madelyn’s back on his Instagram Stories on September 22, which led fans to believe it might be a soft launch.

a woman seated at a bar watching a game of pool
@alexiosgreece//Instagram

There’s a chance it could be, as they were reportedly spotted again on September 23—this time, at NYC hotspot The Lions. Neither Madelyn nor Alexios has commented on their rumored romance yet, but fans flooded DeuxMoi’s comments section with mixed reactions, from “Who is this man?” to “Her love life is so confusing to me but huge upgrade.”

That being said, it seems like a good time to do some research so we can alert our group chats. Here’s what we know about Prince Constantine-Alexios of Greece and Denmark since his sightings with Madelyn Cline.

Constantine-Alexios is a Scorpio

The 26-year-old prince was born on October 29, 1998, making him a Scorpio.

He grew up in NYC

Per People, Alexios was born in New York City before attending secondary school in England in 2017. He then graduated from Georgetown University with a Bachelor of Arts in English.

He’s a literal prince

Yep. He is the eldest son and second child of former Crown Prince Pavlos and Crown Princess Marie-Chantal of Greece. According to Royal Greece’s Instagram profile, he’s the second in line to the defunct throne behind his father, Pavlos.

nicholas of greece and chrysi vardinogianni wedding in athens
Milos Bicanski//Getty Images
Former Crown Prince of Greece Pavlos, Marie-Chantal, Prince Constantine Alexios, and Prince Aristides Stavros.

He has three younger brothers—Prince Achileas-Andreas, Prince Odysseas-Kimon, and Prince Aristidis-Stavros—and one older sister, Princess Maria-Olympia.

Prince William is his godfather

No, we’re not kidding. Here’s a 17-year-old William at Alexios’ christening in 1999 to tickle your fancy:

prince william and konstantine alexios
Tim Graham//Getty Images

His social media presence is pretty low-key

Despite being literal royalty, Alexios only has eight posts published on his Instagram profile—and they barely show his face. He still boasts about 157K followers, though, so…not too shabby!

Constantine Alexios’ dating history is stacked with celebs

According to Page Six, Alexios has had some pretty famous flings in the past. He was linked to Brooks Nader from June to July 2024 and Poppy Delevingne from late 2022 to early 2023.

2025 espy awards arrivals
Michael Buckner//Getty Images
burberry summer 2026 show arrivals
Dave Benett//Getty Images

He was seemingly spotted with Madelyn Cline on multiple occasions

Over the weekend of September 20, DeuxMoi received multiple tips that Alexios and Madelyn were with each other throughout New York City. Per footage posted by the gossip site, they were recorded walking through the streets of New York before they packed on PDA at The Lions on September 23.

Alexios’ sister, Olympia, also hung out with the actress recently, as evidenced by this photo posted by model Ivy Getty on September 23:

ivy getty instagram
@ivygetty/Instagram

Neither Madelyn nor Alexios has commented on the nature of their relationship—or, if there even is one at all—but you already know we’re keeping an eye out for developments around this potential pairing.