Ivanka Trump celebrates Tiffany Trump's birthday with throwback photo

Happy birthday, Tiffany Trump!

The first daughter rang in her 26th birthday on Oct. 13 with a series of well-wishes from her famous friends and family, including mother Marla Maples, sister Ivanka Trump and her boyfriend Michael Boulos. Boulos marked the Georgetown Law student's big day with a montage of photographs from the couple's enviable travels, but it's Ivanka's photo that's making headlines.

In the snapshot, Ivanka, who is ten years older than Tiffany, pretends to fall asleep on a couch in a dramatic all-black outfit. An unphased baby Tiffany sits in her lap wearing only her diaper and with a bottle in-hand.

"Happy, happy birthday Tiffany!" Ivanka captioned the photo. "You have grown into an amazing woman, despite my many babysitting fails! 😜."

"Haha I love this and I love you so much! 💕" Tiffany commented, while other fans shared their well wishes in the comments.

Sister-in-law Lara Trump, who celebrated her 37th birthday on Oct. 12, also posted a selfie in honor of Tiffany's birthday, captioning the photo #Almostbirthdaytwins.

While President Trump marked the US Navy's birthday over the weekend with an Instagram post, he has yet to publicly wish Tiffany a happy birthday.