Avril Lavigne, 42, has delighted fans by announcing the arrival of her first child, a baby girl! The "Sk8er Boi" singer shared adorable pictures of her newborn daughter on Instagram today, November 13.

Lavigne posted several sweet black and white snaps, including one where she cradled her baby girl, who was dressed in a cute leopard-print baby grow. Another picture showed the tiny tot's hand being held by Avril and her mystery partner.

The singer's playful caption also caught fans' attention. Alongside the pictures, she wrote: "Our Mini F Princess has arrived."

The announcement also featured a charming nod to the newest member of the family: three pairs of Vans trainers, carefully arranged in size order on top of a skateboard. The footwear appeared to represent the different family members, with the smallest pair seemingly belonging to the new arrival. Lavigne had kept details of her baby's arrival under wraps, making the announcement a complete surprise for her fans.

The Canadian singer has been one of pop music's biggest names since bursting onto the scene in the early 2000s with hits including "Complicated," "Sk8er Boi," and "Girlfriend."

Avril has not yet revealed her daughter's name or shared the identity of the baby's father, despite including three pairs of Vans trainers in the announcement pictures. The singer has been married twice previously. She tied the knot with Sum 41 frontman Deryck Whibley in 2006, divorcing in 2010. She later married Nickelback rocker Chad Kroeger in 2013, but the couple split two years later.