Serena Williams Pens a Heartfelt Note on Instagram Following Her Dog Jackie's Death

It's an extremely tough time for Serena Williams: the tennis player's dog of 16 years, Jackie Baila Pete Williams, passed away on Tuesday. Serena took to Instagram to share the sad news, along with a series of cute photos of Jackie. Her touching message is as follows:

Today really is hard for me. My special friend in which I got at 17 (2 weeks before I won my very first Grand Slam) left me today. She was 16 years young and up until a few days ago was still sprinting. Her poor body gave out this morning and she had a way of telling me it was time for me to be brave and let her go. With my dad by my side we were able to say a loving goodbye. She was with me from 1999 until today and I miss her so much. I got out of the shower this afternoon and she was not there to lick my leg as she always did everyday to remind me how much she loved me. I feel so lucky to have such a special friend. Give your dog, cat, pet a big hug. #breakingheart #bff Jackie Baila Pete Williams I will miss you and your memory will live forever.

Keep reading to see more photos of Jackie, and then check out more photos of stars and their pets.

"Jackie- Lauralei, Chip, and Mommy miss you so much. We will never forget u. Thank you for the kindness and joy you brought us."

"My angel."