While just about every look Markle has worn since becoming a part of the royal family has been abundantly praised, this outfit managed to divide royal watchers.
Speaking about the moment when he told the couple he would not make the wedding, the 73-year-old said: "They were disappointed".
He said his daughter had told him about the engagement first, and then in a subsequent phone conversation, Harry joined Meghan on the phone and asked for his permission.
"I'm a footnote in one of the greatest moments in history rather than the dad walking her down the aisle", he said. "That really upsets me somewhat".
Drama over whether Thomas Markle would attend threatened to overshadow Harry and Meghan's wedding.
Despite never having met Prince Harry in person, Thomas Markle said the royal and Meghan made a joint phone call during which Harry asked for his daughter's hand in marriage.
The ceremony lasted around 45 minutes and afterwards the wedding guests were invited back to a reception at Celia's parents' home nearby. "I realized it was a serious mistake", he said.
Harry and Meghan looked delighted to be at the occasion as they arrived at the church holding hands and smiling and laughing with the other guests.
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"It was just a loose conversation. Well obviously that all went to hell", he said. Appropriately, she wore a princess-style dress, which she accessorized with the Spencer tiara-the same one that Diana wore on her own wedding day in 1981.
She also wore a white fascinator, evoking an unexpected bohemian vibe for the high society event, which had divided royal watchers, Harper's Bazaar claimed.
Celia is the first cousin of Prince Harry, Duke Of Sussex and Prince William, Duke Of Cambridge.
"Over the last few weeks, everybody has had different opinions, some people said I was faking my heart attack, some people said I was skipping out, all kinds of stories were coming out about me, negative ones".
"Sadly, my father will not be attending our wedding".
Harry and Meghan tried to keep things low-key, but, as usual, all eyes were on them.
"My daughter is capable of anything", said the proud dad.
He also spoke about his daughter's desire for children. "My daughter is capable of anything and she will be a compliment to the royal family".