He was also impressed by her passionate campaigning to get older people back into employment as the ambassador for the Prince's Initiative for Mature Enterprise (Prime).
Prime aims to help over 50s to start their own companies.
Reflecting on her contribution to the charity at its launch seminar in London today, he praised her "tireless" philanthropy.
"Before referring to the work of Prime, I did just want to pay, if I may, a special tribute to Lynda Bellingham, who was, as many of you know, a wonderful ambassador for Prime," Prince Charles said.
"Personally I was greatly saddened to learn that she had passed away this week. As you know, she was not only a marvellous actress but also someone who worked tirelessly for others. So she really will be hugely missed."
Lynda Bellingham: Life in pictures
Lynda Bellingham: Life in pictures
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Lynda Bellingham poses holding her medal after being invested as an Officer of the Order of the British Empire (OBE) during a ceremony at Buckingham Palace in central London on 14 March 2014
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Lynda Bellingham with (left to right) sons Michael and Robert, husband Michael and step-son Bradley arrive at Buckingham Palace in central London for an Investiture Ceremony where she received an OBE (Officer of the Order of the British Empire) on 14 March 2014 in London
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Lynda Bellingham and Michael Pattemore attend the BAFTA Television Craft Awards at The Brewery on 27 April 2014 in London
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Lynda Bellingham attends The Laurence Olivier Awards at the Royal Opera House on 28 April 2013 in London
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(L-R) Carol McGiffin, Lynda Bellingham, Denise Welch, Kate Thornton, Leslie Garrett and Andrea McLean on 20 January 2010
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Lynda Bellingham and her dance partner Darren Bennett on 2009 Strictly Come Dancing
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(L-R) Amy Lame, Diana Moran, Ruth Lorenzo, Laila Morse and Lynda Bellingham launch the 'If I can do it...' Cancer Research Race for Life campaign on 2 March 2009 in London
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'Loose Women' Presenters (L-R) Sherrie Hewson, Coleen Nolan, Carol McGriffin, Jackie Brambles, Lynda Bellingham and Jane McDonld arrive for the TV Quick & TV Choice awards at the Dorchester Hotel on 3 September 2007 in London
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Britain's Queen Elizabeth II chats to guests at the ITV 50th Anniversary celebration, including (R - L) Nicholas Parsons, Lynda Bellingham and Harry Hill on 13 October 2005 in London
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(L to R) Actors Dame Diana Rigg, Robert Bathurst, Zoe Wanamaker, Stephen Fry, Jane Asher and Lynda Bellingham attend the Stars Shine For Autism Christmas Concert on 2 December 2003 in London
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Nickolas Grace and Lynda Bellingham on 24 February 1999
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Lynda Bellingham with her sons in 1991
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A scene during rehearsal for an Oxo TV advertisment which was screened in 1987, with Lynda Bellingham and her on-screen husband, Michael Redfern
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Film producer Greg Smith (left) with his bride actress Lynda Bellingham after their marriage, accompanied by the best man actor Robin Askwith, on 7 November 1975
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Actress Lynda Bellingham on 4 October 1972
Bellingham had previously been invited to the launch of the organisation, which is now part of the Prince’s Business In The Community charity umbrella, but had declined due to her ill health.
A recent study co-produced by the International Longevity Centre UK and Prime indicated that up to 1.5million people aged between 50-69 had vacated their positions over the last eight years, due to forced early retirement, poor health or redundancy.
According to the research, 1.1million of these employees wanted to be in work.
Charles said the study showed that "employing older people does not mean younger people are crowded out of the labour market" and that there existed plenty of "room" for all levels of experience.
Older workers, he concluded, were not "a burden but a valuable asset" to any workforce.
His royal tribute to Bellingham comes a day after the airing of her final appearance on Loose Women an event that attracted over 2million viewers. During the show, Bellingham was awarded a standing ovation by the audience and moved her former co-presenter Coleen Nolan to tears.
On how she wished to be remembered, she said: "Just as an honest person.
"Honesty. We've been through this as Loose Women - you can't do Loose Women unless you're honest.
"You can't hide anything, it really is honest when we answer questions. That's why I felt I could write about it and people would trust.
"Trust is a huge thing. Not just as an actor, not just as a lover, not just as a wife, that trust thing. Just to say you could trust her. As you know I wanted to win an Oscar at 75 for Best Newcomer! Sadly that's gone out of the window."Reuse content