15-year-old Meadow posted a photo of her as a toddler being held by her dad - who died in a car crash in November last year, reported New York Daily News.
Alongside the picture, his only child wrote: "Happy birthday. I love you."
Meanwhile, the actor's 'Fast and Furious' co-star Jordan Brewster remembered Paul by posting an image of a sunset.
She captioned it with: "Happy Birthday PW. #ROWW. Always in our hearts."
The hashtag #ROWW refers to the late star's charity, Reach Out WorldWide, which supports survivors of natural disasters.
Reach Out Worldwide are asking people to upload a photo of a sunrise or sunset to social media and use the hashtag #OneMillionForROWW before making a donation to the charity.