Transcript for Meghan Markle's father to have heart surgery, will miss wedding: Reports

Next tonight here, the royal wedding just four days away now, and American Meghan Markle about to marry a prince. Tonight, her father, after saying he would not be at the wedding, apparently changing his mind, but there is a new report late today suggesting he might be going into heart surgery now. ABC's James Longman again tonight from London. Reporter: Tonight, shocking news. Meghan Markle's father is to undergo heart surgery, according to TMZ, and will not attend the royal wedding. Thomas Markle reportedly checking himself into a Mexican hospital Tuesday after he said he had a heart attack last week. Just hours earlier, the website reporting that after days of back and forth, Markle was planning to attend his daughter's wedding. Markle telling TMZ, "I hate the idea of missing one of the greatest moments in history and walking my daughter down the aisle." The 73-year-old had reportedly canceled his trip after accusations that he staged these photos with Paparazzi. Meghan's estranged half sister, who has publicly criticized the bride, said she was behind the stunt. He wanted to stay no. They have an obligation, an ethical obligation to allow me to be portrayed as I am, living a healthy lifestyle, not caught in unflattering positions, as media vultures had done. There's no bigger media vulture with this wedding than you. Reporter: Before this latest setback, Meghan Markle was still hopeful her father would come. With just four days to go, the palace faces a big change of plan. Meghan's mother now the likely person to take her daughter down the aisle, the only member of Meghan's family to be with her on her big day. James, thank you. Beginning Friday, "World news tonight" will be anchored from London. I'll seal you from there. Robin Roberts and I, first thing in the morning on Saturday, 5:00, set your DVRs. We'll see you first thing in the morning on ABC.

This transcript has been automatically generated and may not be 100% accurate.