Transcript for Countdown to the royal wedding: Who made the guest list?

We'll count down to the royal wedding, George loves this. It's just one week from Saturday. Who is getting invites? Eva, you'll tell us more. A hot ticket. Anyone who has been a bride knows this is the crunch time putting together all those little final details. Now everyone should, they should have rsvp'd and learning more about who will be at the royal wedding. It's the most coveted invitation of the year. Harry and Meghan's wing is just over a week away. It will be the who's who of Hollywood royalty mingling with real-life royalty. But who actually made the cut? Victoria and David Beckham, George and Amal Clooney. Priyanka Chopra, Meghan invited the entire cast of "Suits." Pipal Middleton with her husband and Ellie Goulding and James Blunt. Reporter: Who may miss their big day? In addition to the Obamas and Canadian prime minister Trudeau and Sophie both close friend, Serena Williams told robin she's not sure if she'll be there. I don't know. You know, I think it's during one of the tournaments so I'll see if I can make it. Reporter: Expect the wedding of the year to potentially also include some of the most iconic names in music at the intimate private reception at frogmore house, who have been by Harry's side from Chris martin of coldplay to Rihanna, Harry famously taking an AIDS test side by side with her in Barbados in 2016. ??? Good-bye ??? Reporter: All a generation after making a touching tribute to Harry's mother at her funeral. ??? Like a candle in the wind ??? Reporter: Elton John has not only helped Harry Caray on Diana's legacy in her HIV and AIDS work, the rocket man is tipped to make a special appearance for the little boy who he's watched grow up in front of his eye, also on Meghan's last-minute to do list this week showing her wedding gown to the queen. Meghan's wedding dress is now being moved to Windsor castle where she'll later this week show the queen informally at a private showing. And that is the detail we're all wanting it know. Her wedding dress. Lots of speculation. Don't miss a moment. You and Michael will be live from Windsor next week as we count down -- Come on in here, Michael. Yes. I can't wait. He wants to know the dress. We'll be there. Do you know who the designers are? It's -- I know but I can't wait, yes. Neither can David pure because David and I will be anchoring the live coverage at 5:00 A.M., may 19th right here

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