Millie Bobby Brown and Jake Bongiovi enjoyed a day out in the Upside Down.

The Stranger Things star recently gave followers a peek into her recent outing at Six Flags Over Georgia with her fiancé, little sister Ava Brown, 11, and friends. Among the highlights from their day of thrills? Jake helping himself to some of her Dippin' Dots ice cream treat and Millie riding a roller coaster and walking in the park with Ava, wearing matching pink Wonder Woman capes.

"Had the best time today at @sixflagsovergeorgia!" the 19-year-old wrote in her July 20 post. "Thank you for having me #SixFlagsMemories #SixFlagsOverGeorgia."

Of course, Millie, who has a home in Atlanta where the Netflix series films, is no stranger to Six Flags Over Georgia. In fact, she's previously visited the park with costars Gaten Matarazzo, Caleb McLaughlin, Sadie Sink and Noah Schnapp.

The actress and Jake, the 21-year-old son of Bon Jovi frontman Jon Bon Jovi, have been together for two years first connecting on Instagram.

And they even shared their major milestone on the special media platform, announcing their engagement in April by sharing a sweet romantic black and white photo with her ring fully in view. Quoting Taylor Swift's song "Lover," captioned her post, "I've loved you three summers now, honey, I want 'em all."

The following month, Millie paid tribute to Jake on his 21st birthday while reflecting on their life together. "This sums us up," she captioned her Instagram post. "In bliss, exploring together. I am eternally holding your hand. happy birthday fiancé. I love you."

Scroll on to see Millie and Jake on their Six Flags outing and look back at their road to engagement:

Millie and Jake enjoyed a day out with her sister Ava Brown, 11, and friends at the Six Flags Over Georgia theme park.

Millie and Jake were spotted out to dinner at Don Angie in New York City's West Village in June 2023, where they were joined by Millie's parents Kelly and Robert Brown. 

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"

For the latest breaking news updates, click here to download the E! News App