Get to Know ‘Supergirl’ Star Milly Alcock’s Chef Boyfriend

Milly Alcock of 'Supergirl' and boyfriend Jo Powell
Jo Powell / Instagram

What To Know

  • Milly Alcock plays the title role in DC’s Supergirl.
  • While Supergirl’s love life is up in the air, Alcock is in a relationship.
  • Alcock made her red carpet debut with chef Jo Powell in February 2026.

If you’ve seen David Corenswet‘s Superman, you already know that DC’s newest Supergirl is unlike anything we’ve ever seen before. Now that June 26 is right around the corner, with Supergirl soaring into theaters this week, we’re breaking down everything you need to know about DC’s newest leading lady, Milly Alcock.

Supergirl follows Superman‘s cousin, Kara Zor-El, and her beloved dog Krypto, a super-pupper whom fans fell in love with in Superman. DC teases, “When an unexpected and ruthless adversary strikes too close to home, Kara Zor-El, aka Supergirl, reluctantly joins forces with an unlikely companion on an epic, interstellar journey of vengeance and justice.” Dog lovers, if you’ve seen the trailer, you might want to grab some tissues for this one.

Whether you’re tapped into the superhero space or not, it’s clear Milly Alcock is about to take the world (by this we mean Earth and Krypton) by storm, so it’s about time we find out more about her life off camera. While we won’t know about Supergirl’s love life for a little longer, it’s time we learn a bit more about the actress who plays her. Here’s what you need to know about Milly Alcock’s boyfriend and their relationship.

Who is Milly Alcock?

Amelia “Milly” Alcock is a 26-year-old Australian actress from Sydney. Before landing the leading role in Supergirl, Alcock was best known for playing young Rhaenyra in House of the Dragon and Simone DeWitt in Sirens. Australian fans may also recognize her as Meg from Upright.

House of the Dragon - Milly Alcock as Rhaenyra

HBO Max

Is Milly Alcock in a relationship?

Yes, Alcock is in a relationship. She is dating London-based chef Jo Powell. Alcock first appeared on Powell’s Instagram on June 22, 2025, when he posted, “Thank you Lisbon for tasting so great.” Along with photos together, Powell posed in a shirt reading “I [heart] my girlfriend.” While the two have been posting PDA-filled content since summer 2025, the couple made things red carpet-official at the BAFTAs in February 2026.

 

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In one of his more recent Instagram posts, Powell gushed over his girlfriend. “Cheers to me for getting u x,” he captioned a carousel of photos.

What does Milly Alcock’s boyfriend do for a living?

Powell runs Schoolnights, a pop-up kitchen that currently runs out of a Hackney jazz bar called 392 Kingsland Rd. Taking a deep dive into his business’s Instagram, it appears that this is Schoolnights’ first project.

On September 29, 2025, he shared,  “First day of class with School Night’s first residency on the 1st of October @392kingslandroad. I’ll be serving up a steak frites–driven menu with 30% food off all night.” Now, we’re incredibly hungry.

Supergirl, In Theaters, June 26

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