Good Trouble star Cierra Ramirez's 2.9 million Instagram followers got an unexpected thrill Sunday when the self-described "luckiest girl in the world" shared pics of her surprise engagement to musician OTHRSYDE. The 28-year-old showed off her new rectangular cushion-cut diamond engagement ring in two of the six carousel shots.

OTHRSYDE, whose actual name is Jonathan Zallez, proposed on bended knee in a lush backyard decorated with white candles and bouquets of white roses. A string ensemble played in the background as Ramirez covered her mouth in surprise. More than 30 of their closest friends and family were on hand to share in the special moment.

Ramirez's cushion-cut diamond appears to be prong-set on a dainty diamond-accented yellow gold band.

In the couple's joint Instagram post, the actress wrote, "Spoiler alert: I said YES! I prayed for a love like yours @othrsyde. I also couldn’t have dreamt up a better proposal if I tried… in my hometown with everyone I love! You are the most thoughtful person & I can’t wait to annoy you for the rest of my life hehehe I’m the luckiest girl in the world."

She punctuated her post with an Engagement Ring emoji and two White Heart emojis.

She also acknowledged the friends who helped organize the celebration and those who flew to Houston to surprise her.

"…You made one of the best days of my life THAT much more memorable," she wrote.

She concluded the post with the phrase, "Wow. Pinch meeeee" followed by a Six Horizontal Line emoji (symbolizing love, warmth, caring and affection), and a final White Heart emoji.

Ramirez is best known for her breakout performance as Mariana Adams Foster in the Freeform television series The Fosters, and her spin-off series, Good Trouble. OTHRSYDE, 27, is a musician, Instagram model and influencer.

Priscilla Quintana, who has the recurring role of Isabella on Good Trouble, commented on Instagram, "That ring is EVERYTHING… Congrats you both."

Ramirez and OTHRSYDE have been a couple since August 2019, most recently celebrating their four-year anniversary together with a romantic trip to Spain and France.

Credits: Images via Instagram / cierraramirez.