Janel Parrish
“Pretty Little Liars” star Janel Parrish got engaged to her longtime boyfriend, Chris Long, a day before she makes her debut as Sandy in a theater production of “Grease” in Canada.Pictured: Parrish performs onstage during the 24th and final “A Night at Sardi’s” at The Beverly Hilton Hotel on March 9, 2016 in Beverly Hills, California. Getty Images/Jesse Grant

Janel Parrish is engaged!

The 28-year-old actress, who is best known for her role as Mona Vanderwaal on Freeform’s “Pretty Little Liars,” announced her engagement to her longtime boyfriend, Chris Long, on Monday.

“Went to the park for a stroll with Klee (Long) and came back with a fiancé. I get to marry my best friend and I’m over the moon. I love you @c_long,” Parrish wrote on Instagram, alongside a photo of her kissing Long on the lips.

Long shared the same picture on Instagram, writing, “Locked it up” with a bullseye emoji.

Parrish confirmed to Entertainment Tonight that the proposal went down in Toronto, Canada, where she is set to make her debut as Sandy in a theater production of “Grease” on Tuesday.

“He proposed in the park,” Parrish said of her soon-to-be husband. “He got down on one knee and I just dissolved into tears! Perfect moment!”

“I get to marry the most amazing man I’ve ever met,” she added. “I feel like the luckiest girl alive!”

An hour after her announcement, Parrish showed off her engagement ring on Instagram. “I can’t stop staring at it,” he said of her new jewelry, which was created by Jean Dousset.

In another Instagram post, Long revealed that he and Parrish headed to Ripley’s Aquarium of Canada following his proposal. “No better way to celebrate with @janelparrish than to go have a quick visit to the local aquarium,” Long captioned a fast-forwarded video of marine animals.

The couple celebrated their first anniversary last month. To mark the milestone, Long posted a slideshow of their time together on Instagram. “Year one down. The happiest. Can't wait for what's to come @janelparrish,” he captioned the set of lovely pics.

“Pretty Little Liars” ended its seven-season run last June. But three months later, Freeform has given a pilot order to spinoff “Pretty Little Liars: The Perfectionists,” which is toplined by Parrish and her “Pretty Little Liars” co-star Sasha Pieterse.

In addition to the potential spinoff and the Canadian production of “Grease,” Parrish will be next seen in movies “Until We Meet Again,” “Tiger,” “The Purple Rose,” “To All the Boys I’ve Love Before” and “Hell Is Where the Home Is.”