Kiernan Shipka Wishes Her 'Sabrina' Co-Star Jaz Sinclair a Happy Birthday!

Kiernan Shipka is celebrating Jaz Sinclair!

The 19-year-old actress took to Instagram on Monday (July 22) to wish her Chilling Adventures of Sabrina co-star a happy birthday.

Jaz is celebrating a quarter of a century on this planet with her 25th birthday.

Kiernan posted a happy, gorgeously filtered group photo in celebration of Jaz’s special day.

“Jazzy, you are the most incredible human. I love you. Happy birthday❤️,” she wrote in the sweet Instagram post’s caption.

Find out which of her Chilling Adventures of Sabrina co-stars – Ross Lynch or Gavin Leatherwood – Kiernan Shipka says is the better kisser here!