Frank Gifford's daughter Cassidy share moving tribute to her late father

Cassidy Gifford Remembers Dad Frank Gifford with Emotional Instagram

Cassidy Gifford took to Instagram Monday to pay tribute to her late father, Frank Gifford, who died of natural causes Sunday morning in Connecticut.

The 22-year-old actress acknowledged how incredible it was that her father, who was 84, had such a storied life.

WATCH: A Look Back at Frank & Kathie Lee Gifford's Enduring Marriage

"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," she wrote. "Today of all days I can genuinely say I am humbled by the outpour of love and support my family has received."

"Yesterday, I lost my best friend," she continued. "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 ended the tribute by citing a bible passage and referencing Frank's Hall of Fame career with the New York Giants, whom the sportscaster played for from 1952 through 1965.

WATCH: Frank Gifford Dies at 84

"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," she added.

Cassidy's mother, Today show host Kathie Lee Gifford, shared the same passage when she thanked friends, family and fans for their support during this difficult time.

MORE: Regis Philbin Shares Memories of Frank Gifford

Pictures of Frank Gifford and daughter Cassidy through the years:

Cassidy Gifford and Frank
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Frank Gifford's daughter Cassidy share moving tribute to her late father
07/28/00 New York City Kathie Lee Gifford's final performance on TV's 'Live with Regis & Kathie Lee' at ABC studios. Frank Gifford with Cody and Cassidy Photo by Evan Agostini/Getty Images
Kathie Lee Gifford, Frank Gifford and daughter Cassidy Gifford (Photo by Bruce Glikas/FilmMagic)
NEW YORK - OCTOBER 25: (L-R top) Virginia Sloane, from Heckscher Foundation for Children, Kathie Lee Gifford, Frank Gifford (L-R bottom) Cody Gifford and Cassidy Gifford attend the unveiling of a new variety Cody Gifford House Program and Playground at 404 East 91st Street and 1st Avenue on October 25, 2007 in New York City. (Photo by Janette Pellegrini/WireImage)
BURBANK, CA - OCTOBER 13: (L-R) TV Host Kathie Lee Gifford, husband TV commentator Frank Gifford and their daughter Cassidy Gifford attend the 2008 Disney Legends Ceremony at the Walt Disney Studios on October 13, 2008 in Burbank, California. (Photo by Stephen Shugerman/Getty Images)
NEWARK, NJ - JUNE 09: (L-R) Bart Oates,Frank Gifford, Cassidy Gifford and Kathie Lee Gifford attend The 5th Annual New Jersey Hall Of Fame Induction Ceremony at New Jersey Performing Arts Center on June 9, 2012 in Newark, New Jersey. (Photo by Bobby Bank/WireImage)
NEW YORK, NY - NOVEMBER 15: (L-R) Frank Gifford, Cassidy Gifford, Kathie Lee Gifford and Cody Gifford attend the opening night of 'Scandalous' on Broadway at the Neil Simon Theatre on November 15, 2012 in New York City. (Photo by Bruce Glikas/FilmMagic)

Earlier Monday, Kathie Lee's Today co-host Hoda Kotb held back tears as she talked about her love for Frank. "He will be remembered with love," she said, adding that she was "grateful" to have known him.

Hoda shared that her co-host seemed remarkably strong as she coped with the death of her husband of 30 years, but that Kathie Lee was also "rejoicing in his life." "She said, 'Let me tell you what a tragedy is," Hoda said of her visit with Kathie Lee on Sunday. "'You know those little kids in the truly brave videos, some of the kids who didn't make it? That's a tragedy. Let me tell you about Frank Gifford.' She said Frank Gifford was a Hall of Famer, an incredible football broadcasting legend, and more than all that, he was a family man. He is a triumph. He got to live to almost 85-years-old."

The kind words didn't go unnoticed by Kathie Lee, who thanked Hoda and Jenna Bush Hager for the "beautiful tribute."

Frank is survived by Kathie Lee, Cassidy and her brother, Cody; three children from his previous marriage to Maxine Avis Ewart, Jeff, Kyle and Victoria; and five grandchildren.

A Look Back at Frank Gifford and Kathie Lee's Love Story
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