She was married to Sir Terry for more than 50 years

The couple's son, Mark, announced the news on Thursday as he paid tribute to his mother on social media.

Sharing a black and white image of his parents, he captioned the post: "Lady Helen Wogan - 1936-2024."

He went on to describe his mum as a "proper lady" who had "love and kindness at her core."

Lady Helen was married to TV legend Sir Terry for more than five decades, up to his death in January 2016 following a battle with cancer.

Together, the couple had four children and five grandchildren.

In the post, Mark wrote: "Our beautiful Mum left us last night after a fantastic life. "From a young Irish rose to Lady Wogan, she was the epitome of style and grace.

"A Mother, Grandmother and Wife, with love and kindness at her core.

"A strength and a belief that saw her through many of life’s trials.

"A sense of humour and a turn of phrase that would have you in fits of laughter. A proper lady in every sense of the word.

"Her and Dad are hopefully sharing a vodka martini and hoping we don’t make too much of fuss.

"We love you Mum, now and forever."

A number of celebs sent their condolences in the comments, with Jeremy Clarkson writing: "Horrible when it happens. Thinking of you."

GB News host Eamonn Holmes penned: "Mark , so sorry to hear. What a woman and what a couple . My sincere condolences to you."

And singer Ronan Keating said: "Sending love matey. God bless ya all."