Kris Jenner paid tribute to Tristan Thompson's mom, Andrea Thompson, after she passed away unexpectedly.

Andrea suffered a heart attack at her Toronto home and was a grandmother to Tristan and Khloe Kardashian's children.

Kris expressed her condolences and shared throwback family photos with Andrea on Instagram.

She praised Andrea for being a devoted and selfless mom and a loving grandmother.

Kris thanked Andrea for her prayers and support and said she will be missed.

Tristan and Khloe flew to Toronto after Andrea's passing, with Khloe going to comfort and support Tristan.

A source said that Khloe and the Kardashian family will always be there for Tristan, who is the father of her children.

Tristan and Khloe have not commented publicly on Andrea's death.

The Kardashian family will support their loved ones during this difficult time.