During her last birthday in the White House, then-President Barack Obama serenaded her daughter with a rendition of the happy birthday song.
The current and former first ladies shared photos of their respective visits to the iconic monument in the heart of the French capital.
Malia Obama interned for the Weinstein Co., and Sasha Obama celebrated her 16th birthday.
She's a freshman at Harvard University.
"From the Obama family to yours, we wish you a Happy Thanksgiving full of joy and gratitude," the former president tweeted Thursday.
Fake news reports popped up last week stating the president's oldest child was part of an assault on an elderly woman.
Obama's eldest has recently been criticized for her actions at the Lollapalooza music festival.
In an essay for Glamour magazine, Obama writes, "It's important that [Malia and Sasha's] dad is a feminist, because now that's what they expect of all men."
"Climate change can no longer be denied, or ignored," the president says.