Gwen Stefani and Gavin Rossdale marked their youngest son's seventh birthday with loving messages for him over the weekend.

The former couple, who divorced in 2016, took to their social media to celebrate Apollo's big day.

Stefani shared a sweet selfie of herself cuddling Apollo on Sunday, captioning the post, "happy b day bday boy!!!"

Meanwhile, the Bush frontman gave a shout-out to his little one on Instagram, sharing a series of since-expired images of the two horsing around and hugging each other throughout the years.

Stefani and Rossdale also share sons Kingston, 14, and Zuma, 12.

Stefani is set to wed fellow "Voice" judge Blake Shelton in the near future. Shelton revealed in a prior interview that he "can't imagine my life without [Gwen's] kids now."