Chyler Leigh as Alex, Floriana Lima as Maggie
Chyler Leigh greeted Floriana Lima a happy birthday on Instagram on Sunday, March 26. The CW

Floriana Lima, who turned 36 on Sunday, got a special birthday greeting from her “Supergirl” co-star Chyler Leigh on social media.

In an Instagram post, Leigh wrote that she’s thankful to have Lima in her life, calling the birthday girl “a gift to the world.”

Leigh and Lima’s co-star Brenda Strong, who celebrated her 57th birthday on Saturday, also greeted Lima on Twitter. In addition to giving Lima a birthday shout-out, Strong also tweeted that she’s hoping to see Leigh on the set of the series to celebrate the latter’s birthday, which falls on April 10.

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Leigh and Lima play lovers Alex and Maggie on “Supergirl.” The friendship between the two actresses started when Leigh and the producers of the show decided to cast Lima as her love interest on the Melissa Benoist-led series.

“I was insistent on being part of the casting process,” Leigh told TV Insider. “I had to know we got the right one. Floriana was the second girl to come in, and as soon as she walked in, I knew it was her. I could see her heart and there was something special about our connection.”

Tonight’s Season 2, episode 17 of “Supergirl” is a big installment for Alex and Maggie, as their relationship is put to test once again when they bump into Maggie’s ex-girlfriend, Emily (Hayley Sales).

“An ex-girlfriend shows up, and it’s a shocking moment for Maggie to run into her — while Alex is with her,” Lima told TVLine. “We are just walking outside of yoga class, and it was one of those moments where I was like, ‘Yeah, I’ve done that, run into an ex with a new partner!’”

Surprisingly, Alex is thrilled meeting Emily. “Alex is kind of like, ‘Oh, let’s go chat her up,’” Leigh told Entertainment Weekly last month of how her character reacts to the chance meeting. “I think there’s profiling thing that’s going on.”

Alex’s interest in Emily leads her to discover her girlfriend’s rather dark past with her ex. “Alex is, you know, she’s Alex. She finds out what really happened between them and it’s a much deeper story, a darker story,” Leigh teased. “It’s a lovely episode for Floriana, just learning more about Maggie’s background and what’s gone on in hers, and how it really does level the playing field between the both of them. So there’s great development in that.”

“Supergirl” Season 2, episode 17, titled “Distant Sun,” airs tonight at 8 p.m. EST on The CW.