Luke Grimes and wife Bianca Rodrigues are celebrating a massive family milestone, and one of Luke’s Yellowstone co-stars couldn’t help but leave a heartfelt note!

On October 9, Bianca had fans emotional as she revealed she’d given birth to her and Luke’s first child together. To celebrate the arrival, she went on Instagram to

share a photo of her holding their newborn son, who was sleeping against her chest.

“Welcome to the world little man 💙,” she affectionately captioned the sweet post confirming the news.

After Bianca shared this life-changing personal update online, it didn’t long for folks to go wild in excitement. But no one was more thrilled than Luke’s TV sister Kelly Reilly, who went to the comments to share a rare and heartfelt note in celebration.

“❤️ so much love to you 3 xx,” she emotionally replied.

Folks were equally ecstatic to see the Yellowstone family expand by one important member. “Congrats to you & @lukegrimes He’s adorable 🫶,” one person exclaimed. “Oh my goodness!!! So precious. Congratulations ❤️,” another declared. “Such a sweet blessing from God. Congratulations on your precious baby boy!!! God bless your family! 👣,” a different follower added.

The news comes just two months after Bianca announced her pregnancy back in August, as she and Luke prefer to keep their personal lives away from social media. But the news of them becoming parents couldn’t come at a better time, as Yellowstone season 5 part 2 is airing new episodes starting on November 10.

As for what else is happening in Luke’s life, he announced back in September how he’ll be hitting the road to perform songs on his Playin’ All the Tracks tour. The first performance will be November 9 in Philadelphia, meaning his fall will be busy between work and being a first-time dad.

Congrats, Luke and Bianca!