Kaitlin Olson just announced the death of her father, Donald Olson, in a heartfelt tribute.

Taking to her Instagram on Monday, May 18, the 50-year-old American actress and comedian paid a touching homage to her father after his death.

Kaitlin shared a carousel of pictures with her late father and penned a lengthy note but did not reveal the details of her father's death. 

Calling him "my first love, my first protector and my forever favorite person," she wrote, “Honestly it feels a little gross to bring this to social media. It’s too fragile and too private. But nothing feels more wrong than to just move on with life as if the worst thing in the world didn’t happen.”

“As if everything that matters didn’t just suddenly end. My dad died. My first love, my first protector and my forever favorite person,” the High Potential star added.

Kaitlin went on to reveal that Donald “fought so hard and so long to stay with us.”

“I hate words right now. None are good enough to describe who he was. The luckiest thing to happen to me in this lifetime was getting him as my dad. Maybe the second was the gift of holding him on his way out. I love you, daddy. I will keep all my promises. Just like you,” she concluded.

It is pertinent to mention that the last picture in the series features Kaitlin holding her father’s hand on what appears to be a hospital bed.