The actor’s eldest child posted a sweet snap of them hugging via Instagram Stories Sunday.
Rumer, 34, showed her baby bump in a blue dress and cardigan in the social media post.
Her dad, for his part, put an arm around her while wearing a gray sweater and jeans.
The expectant star went on to share a throwback photo with Bruce to her feed, as well as a video of his family members singing “Happy Birthday” and presenting him with a pie.
The “Sixth Sense” star was smiling in the video.
“I love you to the 🌙. You are so cool,” Rumer captioned the tribute to her “Daddio” over the weekend.
The actress’ siblings, Scout Willis and Tallulah Willis, also honored their father on social media.
“Today is not necessarily an easy day, because it’s a day full of so deep love, and our grief really does show us the depth of our loving for someone,” Scout, 31, wrote. “I’m trying to be with both today.”
Tallulah, 29, called Bruce her “numero uno,” gushing, “I love him and he loves me — what a delight!”
The actor’s wife, Emma Heming, and his ex Demi Moore also rang in his birthday, marking Bruce’s first since his frontotemporal dementia diagnosis.
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The Golden Globe winner’s family members explained in a joint statement in February that “there are no treatments for the disease” he suffers from.
“FTD is a cruel disease that many of us have never heard of and can strike anyone,” Bruce’s loved ones added at the time.
The Emmy winner was previously diagnosed with aphasia. News broke of his language disorder — and his retirement — in March 2022.
Amid Bruce’s progressive brain disease, Rumer is carrying the “Die Hard” star’s first grandchild.
Heming, Moore and Rumer’s siblings all attended her baby shower earlier this month.
While it is unclear when the pregnant star and Thomas, 28, began dating, the duo went public with their romance in November 2022.