Gwen Stefani and Gavin Rossdale pen birthday message for son Kingston

Gwen Stefani and her ex-husband, Gavin Rossdale, penned a sweet tribute for their eldest son, Kingston, on his 18th birthday.

On Sunday, Gwen posted a few photos and videos of her son on Instagram.

She captioned the post: “Happiest birthday in Kingston (white heart emoji) my first baby boy 🙂 I can’t believe you’re 18 today… I love you!”

On the other hand, Gavin also shared dozens of photos of his 18-year-old son.

One image showed Kingston walking under what appears to be a cherry blossom tree while holding an umbrella.

He wrote: “HAPPY BIRTHDAY KINGSTON -18 today and a big step towards your future. It’s been the best ride of my life so far and I can’t wait to see where you go from here I have complete trust in you and I deeply admire the man inside, you have grace, charm and humility.

Gavin continued: “You are at the wheel of your destiny so choose wisely. Your musical talent is crazy and soon the world will hear your heart singing. Follow your muse, stay curious and keep creating. I couldn’t love you more than I do .I wish you all the happiness, all the health and all the creativity.”

For the unaware, Gwen and Gavi, who split in 2015, also share sons Zuma, 15, and Apollo, 10.