Heidi Klum reminisces during Leni's 21st birthday celebration.

Rewritten Article:

Heidi Klum's Instagram was bursting with nostalgia as she celebrated her eldest girl, Leni Klum, turning another year older. On this 21st birthday, the ex-judge of America's Got Talent flipped through the pages of time, sharing heartfelt posts commemorating Leni's special day.

As Leni stepped into adulthood, Heidi fondly looked back at the day Leni was born, nestled snugly in her grandmother's arms. The throwback photo, accompanied by the soothing tunes of My Sweet Baby by The Mark-Keys, brought a wave of emotions as the supermodel reminisced about Leni's new beginning.

In another post, mother, grandmother, and her precious Leni were captured in a three-generation picture, reflecting the beautiful bond they share. Heidi expressed her eternal love for her daughter, using emoticons that spoke volumes about their bond.

As the day unfolded, Heidi showered Leni with additional throwbacks, featuring Leni's early years, adorably cradled and cherished by her mother.

The day wrapped up with a heartwarming video of baby Leni, covered in spaghetti sauce, making a cute mess of herself while enjoying a meal. The caption read, "Happy birthday, my love."

Interestingly, Leni is not Seal's biological daughter. In her journey, Heidi was in a relationship with businessman Flavio Briatore when Leni was born. Although Flavio did not actively partake in Leni's life, Seal, Heidi's future husband, became a significant figure in Leni's upbringing following their marriage in 2005. Seal formally adopted Leni in 2009 and continued to play a pivotal role in her life even after Heidi and Seal parted ways in 2014.

Heidi, now married to Tom Kaulitz, finds solace in his unwavering support for her children, including Leni. Tom, who is part of the band Tokio Hotel, affectionately calls himself an "extra dad" to the family[2].

Leni began dating Aris Rachevsky in 2019 and has garnered recognition in the modeling world, challenging the "nepotism" debate by highlighting her passion and dedication to her craft[1][2].

In 2022, Leni spoke candidly about her career, acknowledging the advantages that come with being the child of famous parents but stressing her own grit and determination to forge her own path[2]. Fast-forward to 2025, Leni turned 21, marking another significant milestone in her life, accompanied by her supportive mother, who continues to be her biggest cheerleader[2][3].

Heidi Klum, commemorating her daughter Leni's 21st birthday on Instagram, reminisced about Leni's birth and shared heartfelt posts that took a trip down memory lane.
The ex-judge of America's Got Talent found a throwback photo of Leni, nestled in her grandmother's arms, with the soothing melodies of My Sweet Baby by The Mark-Keys in the background.
A three-generation photo of Heidi, Leni, and Leni's grandmother depicted the beautiful bond they share, with Heidi expressing her eternal love using emoticons.
Heidi's Instagram posts included several throwbacks of Leni's early years, cherished and adored by her mother.
The heartwarming video of baby Leni covered in spaghetti sauce, making a cute mess of herself while enjoying a meal, concluded the series of sweet birthday tributes.
Leni, who is not biologically Seal's daughter, has gained recognition in the modeling world and has been in a relationship with Aris Rachevsky since 2019.
Heidi Klum, now married to Tom Kaulitz, finds solace in his unwavering support for Leni and her family, with Tom affectionately referring to himself as an "extra dad."