Also selected for the much-anticipated event at Windsor Castle on Saturday are the couple's goddaughters and godson, and the children of one of her best friends.
The father of American actress Meghan Markle said on Tuesday he could not attend his daughter's wedding to Britain's Prince Harry on Saturday because he needed a heart procedure.
Ms. Meghan has previously heaped her father with compliments for investing in her future.
Markle's half-sister, Samantha, told a British TV network on Monday that she urged their father to stage the photos for the paparazzi to help improve his image.
Tracy Dooley also operates a personal blog on Facebook titled "Royal Wedding with The Dooley Markles", where she posts news articles related to Markle and Prince Harry, and photos of herself. "She and Prince Harry ask again for understanding and respect to be extended to Mr. Markle in this hard situation", the statement said.
Meghan Markle, the fiancee of Britain's Prince Harry, attends the Dawn Service at Wellington Arch to commemorate Anzac Day in London, Britain, April 25, 2018.
Meghan is Doria's only child, and the two are known to have a close relationship, with Doria accompanying Meghan on the red carpet on many occasions and even attending the Invictus Games with Meghan and Harry a year ago.
"He sent me a message that he was undergoing heart surgery", she said, "He's been under a tremendous amount of stress amidst health challenges".
Sharing a parent with U.S., home of Markle's former show, Suits, NBC gained access to her Hollywood circle - including NBCU cable entertainment chair and Markle mentor Bonnie Hammer - for May 16's Inside the Royal Wedding.
The announcement was met with an outpouring of support for both Ms Markle and her father on social media.
According to a U.S. celebrity website TMZ, Mr. Thomas has given his ex-wife his blessing to perform the duty. This weekend, reports in the London Times and The Mail on Sunday said that Markle was not only staging the portraits with the paparazzi, but getting paid for them.
Her mother Doria Ragland is a 61-year-old yoga instructor and clinical therapist.
Nonetheless, that doesn't mean Queen Elizabeth hasn't made an effort to welcome Markle into the royal family.