"Dad, I'm so heartbroken, I love you", the letter reads.
Asked if he was going to be godfather to the royal baby, he said: 'No, I'm now a father of twins, I've got enough s***. The former actress pulled her hair back in a classy low bun.
And by the time he or she starts talking, it's likely the sweet bundle of joy will call the future King "Grandpa Wales", just like George, Charlotte and soon, Louis.
Britain's famously aggressive press at first welcomed Markle into the royal fold when she and Harry tied the knot at a lavish Windsor Castle wedding last May, in a ceremony attended by Clooney and his human rights lawyer wife Amal.
Shortly before his daughter was due to Wednesday Harry, Thomas staged paparazzi photos of himself preparing for the wedding. "She's getting a raw deal there".
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Secretary-General of the Commonwealth, Baroness Patricia Scotland was also billed to attend the event. It is expected to be a keenly contested election.
Five unnamed friends of the duchess spoke to People in an effort to counter the "global bullying" directed at her.
Thomas Markle Snr says the letter was sent by his daughter.
Meghan, who was wearing a white Calvin Klein dress and a white Amanda Wakeley coat, held hands with Harry as she entered the museum where she was greeted with flowers given by 12-year-old Sage Saunders.
Meghan revealed in January that her baby is due around the end of April or beginning of May.
Over the weekend, a deeply personal letter allegedly written by the duchess to her father in August, was published - months after he missed her wedding.
She later added: "He did try to contact her she was the one who ignored him and all of us".
Meghan has also faced intense interest from the unsparing United Kingdom press since her engagement to Prince Harry was announced in 2017. "She can write all the fake, contrived letters she wants to show off her penmanship but that's all it is".