Cassidy Gifford, her brother Cody, and their mom Kathie Lee are mourning the sudden passing of their father and husband Frank Gifford. Frank died on Sunday of natural causes at their Connecticut home. He was just a few days shy of celebrating his 85th birthday.

Kathie Lee Gifford, together with Cody and Cassidy Gifford, issued a statement on Sunday about Frank Gifford’s death.

“It is with the deepest sadness that we announce the sudden passing of our beloved husband, father and friend, Frank Gifford,” the family said in a statement.

“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.”

Frank Gifford, NFL Hall of Famer and Husband to Kathie Lee Gifford, Dies at 84 http://t.co/iUy5GfXhrn pic.twitter.com/dUs1JjD5C4

— CELEBUZZ (@CELEBUZZ) August 10, 2015

Later on Sunday, however, Kathie Lee Gifford addressed her followers via social media.

Deeply grateful to all 4 ur outpouring of grace. We r steadfast in our faith & finding comfort in knowing where Frank is. Phillippians 4:13.

— Kathie Lee Gifford (@KathieLGifford) August 9, 2015

She also thanked The Today Show’s Willie Geist for the tribute he aired about Frank Gifford.

Thank you, @WillieGeist for your sweet tribute to Frank. So kind but so true.

— Kathie Lee Gifford (@KathieLGifford) August 9, 2015

Katie Couric, who formerly co-hosted The Today Show, shared her condolences with Kathie Lee, Cody, and Kathy Gifford on Frank’s sudden passing.

So sorry to hear about Frank Gifford. My deepest sympathy to Kathie Lee and the entire family.

— Katie Couric (@katiecouric) August 9, 2015

Meredith Vieira, another former Today Show co-host, shared thoughts and prayers with the family, too.

So heartbroken to learn of Frank Gifford's passing. He was a true gentleman. My thoughts and prayers go out to @KathieLGifford and family

— Meredith Vieira (@meredithvieira) August 9, 2015

Frank and Kathie Lee Gifford raised two children together who are both–in some ways–following in their famous parents’ footsteps. Cassidy Gifford is pursuing an acting career, and stars in the recent hit thriller film, The Gallows. She also starred in Christian film God’s Not Dead.

Cody Gifford graduated from the University of California School of Cinematic Arts. He is pursuing a Master’s in creative writing, and has worked as an intern at a California TV station. Like his famous dad, he was an avid football player in college.

Kathie Lee Gifford hosts the final hour of The Today Show each weekday along with Hoda Kotb. The two are a hilarious pair as they talk fashion, music, celebrities, and more. It is likely that Hoda Kotb will honor Frabk Gifford and share condolences with Kathie Lee Gifford as part of the show on Monday. Both Cody and Cassidy Gifford have been guests of Kathie Lee and Hoda on previous episodes of The Today Show.

In addition to Cody and Cassidy Gifford, Frank Gifford is survived by wife Kathie Lee Gifford and three children from a previous marriage–Victoria Gifford, Jeff Gifford, and Kyle Gifford.