Kate Hudson's son Ryder goes official on Instagram with Leslie Mann's daughter Iris

mr.ryderrobinson/Instagram; Man: Taylor Hill/WireImage; Hudson: Stefanie Keenan/Getty

Kate Hudson has nothing but love for her son Ryder Robinson and his girlfriend – who happens to be the younger daughter of one of Hollywood’s funniest leading actresses!

The How do I get rid of it in 10 days? The 42-year-old actress left a supportive comment on Robinson's latest Instagram post, in which he planted a kiss on Iris Apatow's cheek in honor of Valentine's Day on Monday.

“Sweets 💞,” Hudson wrote, while Iris, 19, added “😌😗” and mom Leslie Mann chimed in with a series of heart emojis. Iris' older sister, euphoria Actress Maude also commented on the adorable picture of the two lovebirds and wrote: “So cute :').”

RELATED: Celebrity Kids Who Dated Other Celebrity Kids!

Ryder Robinson/Instagram

Although it's unclear how long the two teens have been together, Hudson has been leaving sweet and encouraging comments on Iris' recent Instagram posts, while Robinson has been leaving sweet and flirty comments on her pictures lately.

Mann, 49, shares Iris and Maude, 24, with husband Judd Apatow, and Hudson shares Ryder with ex Chris Robinson. The Almost famous The actress also has 10-year-old son Bingham Hawn with her ex Matt Bellamy and 3-year-old daughter Rani Rose with her fiancé Danny Fujikawa.

Don’t miss a story – sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Hudson celebrated her eldest son's 18th birthday in January and penned a heartfelt tribute to Ryder on the occasion of his big day.

RELATED VIDEO: Oliver Hudson shows his mother Goldie Hawn and Kurt Russell's house in Aspen: “Curtains are 30 years old”

“And then he was 18 ❤️,” Hudson wrote alongside a montage of photos with Ryder from the past few years, starting with a snapshot from her pregnancy and ending with a recent selfie of them together.

“My heart is filled with love and excitement for your future,” she added. “Ryder, you incredible, unique, hilarious, loving human being, I love you endlessly. Happy birthday @mr.ryderrobinson PS Your life is now your responsibility and not in my hands! Good luck son!!! 🤪🙏😉🥰🎂.”