Vanessa Bryant celebrated her daughter Natalia's 18th birthday by posting throwback pics of her first-born child and her late husband, Kobe Bryant.

She called Natalia "a beautiful role model to so many people."

"Dear Natalia, Happy Birthday! Mommy and Daddy are so proud of the young lady that you are. You have displayed so much strength and grace throughout the most difficult year of our lives. Thank you for stepping in to help me with your little sisters. You're such an incredible big sister and a beautiful role model to so many people."

She captioned one photo of infant Natalia with her father, "Daddy's little princess, Natalia."

Kobe, 41, and the couple's 13-year-old daughter, Gianna, were among nine people tragically killed in a fiery helicopter crash last January. Kobe and Vanessa, 38, were also parents to daughters Bianka, 4, and Capri, 19 months.

Since Kobe's death, Vanessa, who is normally private, has shared her life with Kobe's fans on social media.