Cassidy Gifford honored her late father Frank Gifford’s memory on Monday with a moving tribute and a throwback picture on Instagram.

Cassidy Gifford’s Tribute To Her Dad Frank Gifford

“Very few people are blessed enough to call their father a legend, and an even smaller number are able to share that notion with the rest of the world,” Cassidy, 22, wrote about the football legend. “Today of all days I can genuinely say I am humbled by the outpour of love and support my family has received.”

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“Yesterday, I lost my best friend… His kindness was infectious, and his grace, beyond compare .. And despite the worldly passing of an incredible man, I undoubtedly know heaven gained one stud of an angel,” Cassidy added. “Philippians 4:13 has never rung so true.. You were an unparalleled Giant in all sense of the word, Dad.. So keep doin’ you up there, because no one does it better, and no one ever will.”

Frank Gifford died of natural causes on Aug. 9 at the age of 84 at the Connecticut home he shared wife his wife, TV personality Kathie Lee Gifford.

“It is with the deepest sadness that we announce the sudden passing of our beloved husband, father and friend, Frank Gifford,” a statement from the family read. “Frank died suddenly this beautiful Sunday morning of natural causes at his Connecticut home. We rejoice in the extraordinary life he was privileged to live, and we feel grateful and blessed to have been loved by such an amazing human being. We ask that our privacy be respected at this difficult time and we thank you for your prayers.”

Both Kathie Lee and her son with Gifford, Cody, took to Twitter to thank those who were offering their thoughts and prayers upon learning of their loss.