Millie and Jake enjoyed a day out with her sister Ava Brown, 11, and friends at the Six Flags Over Georgia theme park.
Millie announced the couple's engagement on Instagram, quoting Taylor Swift's song "Lover." The two would go on to celebrate with family and friends at an engagement party weeks later.
Jake marked Millie's 19th birthday on Feb. 19, 2023 with a sweet tribute, writing, "Another year around the sun together happy 19th to the girl of my dreams."
The sweet post included photos of the couple.
The pair's silly side is depicted in one image of Jake and Millie clowning around in the pool
Jake and Millie snuggle up in a romantic selfie.
Millie shared photos of the couple in celebration of the New Year, writing, "endlessly in love with the year I've had."
One snapshot showed a photo booth strip of the loved-up couple.
As Millie put it, "grateful for my friends, family, donkey (bernard), my doggies, my puppies teeth, and my partner for life."
Millie and Jake were twinning at the premiere of Stranger Things season four in New York City.
Millie and Jake make their first joint appearance at a celebrity event—the 2022 BAFTA Film Awards in London.
"We're starting a band," Jake wrote on Instagram, "send name ideas."
Jake posted this photo, with the caption, "bff <3"