"Stay sweet 'Classy with a hint of sassy,'" Iman wrote to her teen daughter
Credit: Source: Iman/Instagram

Iman and the late David Bowie‘s little girl is growing up.

The 60-year-old model shared a photo of the couple’s daughter, Alexandria “Lexi” Zahra Jones, in honor of the teen’s 16th birthday.

“Happy sweet 16th birthday to my baby girl Lexi!” she captioned the beautiful black and white portrait.

Iman added, “Stay sweet ‘Classy with a hint of sassy.'”

Jones seems to be taking after her model mother in the photo, giving the camera a smoldering gaze in the selfie.

A message was posted on her late father’s Twitter account as well. “HAPPY SIXTEENTH BIRTHDAY TO LEXI ‘Fill your heart with love today, Don’t play the game of time…’ We’re sure you will all want to join us in wishing many happy returns of the day to Alexandria Zahra Jones on her 16th birthday,” the caption reads.

“Lexi, as she’s known to her friends and family, is pictured here with her parents as a new-born baby back in 2000. The main pic is of her father in 1963, an ambitious 16-year-old himself with a particularly bright future ahead of him.”

It concludes, “Happy Birthday Lexi, here’s wishing you love ‘n stuff from everybody here.”

VIDEO: Stars React to Music Legend David Bowie’s Passing

Bowie and Iman met in October of 1990, and “they were inseparable” ever since, the couple’s friend, hairstylist Teddy Antolin, told PEOPLE in January.

“They really knew each other because they had come up and traveled in the same circles. They were great together,” Antolin added at the time. “She was a real force and he needed a woman by his side to keep him focused.”

The model and the rocker married in Tuscany after two years together. In 2000, they welcomed their daughter.

Bowie was 69 when he died of cancer in January.

His widow and their daughter have remained largely out of the public eye since his death. In February, Iman was photographed for the first time since the the news of the music icon’s death broke when she stepped out in New York City to walk the dog they raised together; then, just days later, she took to social media to express her “love & gratitude” for the outpouring of support she received.

In April, just three months after losing her husband, Iman announced on Instagram her mother Maryan Baadi had also died.