Central City is Coxnogoing to have a new resident. 

The Flash star Grant Gustin and his wife of five years Andrea "LA" Thoma are expecting their second baby together, the couple have announced.

Alongside an adorable black and white photo of their family of three shared to Instagram March 3, Grant and LA wrote, "shaping up to be an exciting year."

The couple's newest arrival will join their 2-year-old daughter Juniper, who they welcomed in August 2021. In fact, she also took part in their sweet announcement, as she was also seen sporting a T-shirt that read "in my big sister era."

Shortly after the pair shared their big news, CW alums couldn't help but gush over the couple. Grant's costar John Wesley Shipp wrote, "Beautiful. Congratulations, you three beautiful people - 4th one on the way - much love." While Lili Reinhart kept it simple, adding, "congratulations!!"

LA also shared insight into her pregnancy journey on her Instagram Story with a nauseous emoji, writing, "Now you know why i retreated to my cave for the last couple months."

In February 2021, following her pregnancy announcement with Juniper, the doctor of physical therapy opened up about having hyperemesis gravidarum, a condition that causes severe nausea and vomiting during pregnancy. Other stars including Kate Middleton and Amy Schumer have also opened up about the side effects of the condition.

"I got so incredibly sick," LA explained in an Instagram video at the time. "I started violently throwing up all day, every day."

As she explained, "Part of the mental aspect of it that makes it so hard is you don't even register that you're pregnant. Because you are so sick, you're just trying to survive."

But, the expecting mother decided to share this vulnerable part of her pregnancy in hopes of encouraging other moms who are navigating the same condition. 

"To all the women who went through or are going through HG or fertility problems," she captioned the video detailing her experience. "I feel you. You are a badass. You got this."

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