Ford Douglas Armand‘s birthday celebration was certainly hopping.
The younger child of Armie Hammer and Elizabeth Chambers Hammer turned 1 on Monday, and marked the milestone with his parents and 3-year-old sister Harper at a Peter Rabbit-themed outdoor brunch bash.
“Babies, bunnies and brunch. Peter Rabbit party to celebrate our angel baby boy who turns ✨O N E✨ today!” Chambers Hammer, 35, captioned an Instagram photo gallery from the sweet event, which featured on-theme garden goodies and a pen with real bunnies for petting.
“Grateful for every moment and for my amazing, sister, @chambiebaby who came right off a flight from New Zealand and worked with me until 4am the night before,” added the proud mom. “Ford Hammer, you are loved. 🐇🥕🎂”
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Hammer, 31, opened up to PEOPLE in September about his new experiences as a father of two, praising daughter Harper for her affection toward her baby brother.
“She loves him — she loves being a big sister,” said the actor, who was recently nominated for a Golden Globe for his performance in Call Me By Your Name.
He added, “She loves taking care of him. They just cuddle and she loves being with him.”
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Though Monday may have been all about his son, Hammer’s little girl has hit some major milestones of her own as of late — including one involving her dad’s voice role in Cars 3.
“This was her first time going with me to sit through a movie,” he told PEOPLE in June of bringing Harper with him to the premiere.
“This was going to be my litmus test, and it proves that anyone can watch this movie if a 2½-year-old girl can watch it and be completely enthralled the whole time,” Hammer joked.