Happiest Kid on Earth! Hilary Duff and Son Luca Spend a Fun Day at Disney (with Jack Osbourne's Daughter)

On Tuesday, Hilary Duff posted a snap of herself and her son Luca, sharing an adorable smooch in front of Disneyland's "It's a Small World" attraction

Photo: Hilary Duff/Instagram

A day at Disneyland is only fitting for a Disney Channel alum!

Former Lizzie McGuire star Hilary Duff took to Instagram Monday to share photos from a trip she and 4½-year-old son Luca Cruz enjoyed together. The proud mama donned a conductor’s Mickey ear hat while Luca opted for a Spider-Man-inspired one.

“Happiest happiest happiest happiest happiest happiest happiest happiest place on earth! We love you @disneyland,” the Younger actress, 29, captioned an adorable shot of the twosome sharing a smooch outside the “It’s a Small World” attraction.

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Duff and her little guy also met up with pal Lisa Osbourne, wife of Jack Osbourne, and their daughter Pearl Clementine, 4½.

RELATED VIDEO: Hilary and Haylie Duff Open Up About the Adorable Moment Their Kids Met

“Disneyland day with my big girl,” the mother of two, who also shares 18-month-old daughter Andy Rose with the reality star, captioned a photo of herself and Pearl enjoying a ride at the park.

The meet up comes as no surprise, considering Duff and the Osbournes spend lots of time together both sans kids (e.g., at shooting practice) and with their little ones (crafting projects, anyone?).

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