Credit: Instagram Photo: Jimmie Johnson's daughters, Genevieve and baby Lydia

If someone needs to race out for diapers at 3 a.m., this is the guy to do it! Jimmie Johnson, a five-time NASCAR champion, welcomed his second daughter on Friday, September 6 in Charlotte, North Carolina.

According to Zap2it, the little lady, named Lydia, arrived at 5 pounds, 10 ounces. Jimmie, 37, tweeted that his wife Chandra, aka “Chani,” was “doing great and is such a rockstar.”

Jimmie and Chandra also have a daughter named Genevieve Marie, who was born in July 2010. Jimmie shared this super-cute photo of the sisters on September 6, writing, “Lydia Norriss Johnson and her proud big sister." Aww!

The couple announced the pregnancy back in April. “We are so happy to share news that we’re having another baby in September,” Jimmie tweeted at the time. “Genevieve is so excited to be a big sister!”

She seems like she’s enjoying it so far! Congrats to the happy family.

Sources: Twitter, Instagram, Zap2it

Credit: Twitter Photo: Jimmie Johnson