Tim tweeted a photo with the caption, "Happy birthday Maggie May. I'm so very proud of you! You shine like the California sun!"
Some fans pointed out the resemblance between Maggie and her mother, saying her long locks, the smile and the youthful skin were "all totally handed down to her from Faith."
Faith also posted an image of a wrapped gift that was given to Maggie by her older sister, Gracie Katherine. The packaging includes drawn-on characters of the two siblings holding three balloons. Although she’s not pictured, Gracie and Maggie also share a younger sister named Audrey Caroline.
Tim and Faith will reach a milestone of their own in October, when they will celebrate their 20th wedding anniversary.