Prince Harry announced last month that he'd be returning the favor of having his brother, Prince William, as his best man. William responded by saying, "It feels great, a real delight ... revenge is sweet."
A look back at Harry's speech at the 2011 Duke and Duchess of Cambridge's wedding, gives a few hints at what William might have in store for his little brother and his bride-to-be, Meghan Markle.
"Harry said William was the perfect brother," one party goer told The Mail on Sunday at the time. "It was exactly how you would expect a best man’s speech to be. He cracked loads of jokes about William. He called him a 'dude' several times. He kept coming back to it, saying 'What a dude.'”
Harry went on to say: "William didn’t have a romantic bone in his body before he met Kate, so I knew it was serious when William suddenly started cooing down the phone at Kate."
The speech included hilarious impressions of the newlyweds: a high-pitched version of Kate calling his brother "Billy" and of William calling Kate "baby."
Harry also poked fun at their grandfather, the Duke of Edinburgh, being dwarfed by Princess Catherine in her three-inch heels, The Telegraph reported.
Harry's toast was a hit with the couple, leaving Kate emotional, according to reports.
Prince William, Duchess Kate and Prince Harry together
Prince William, Duchess Kate and Prince Harry together
Britain's Kate, Duchess of Cambridge, and Prince Harry applaud Prince William after his speech during a training event to promote the charity Heads Together, at the Queen Elizabeth II Park in London, Britain, February 5, 2017. REUTERS/Alastair Grant/Pool
Britain's Prince William, Kate Duchess of Cambridge and Prince Harry (L) stand ready to give an award during a visit to The Mix in London, December 19, 2016. REUTERS/Alastair Grant/Pool
HAYES, UNITED KINGDOM - APRIL 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the official opening of The Global Academy in support of Heads Together on April 20, 2017 in Hayes, England. The Global Academy is a state school founded and operated by Global, The Media & Entertainment Group, educating students for careers in broadcasting and the digital media industry. (Photo by Max Mumby/Indigo/Getty Images)
Kate Duchess of Cambridge, Prince William, and Prince Harry (R) greet guests attending the Patron's Lunch, an event to mark Britain's Queen Elizabeth's 90th birthday, in London, June 12, 2016. REUTERS/Peter Nicholls
LONDON, ENGLAND - APRIL 05: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the Service of Hope at Westminster Abbey on April 5,2017 in London, United Kingdom. The multi-faith Service of Hope was held for the four people killed when Khalid Masood committed an act of terror in Westminster on Wednesday March 22. Survivors, bereaved families and members of the emergency services joined The Duke and Duchess of Cambridge, Prince Harry, the Home Secretary, Amber Rudd and London Mayor, Sadiq Khan, in the congregation. (Photo by Dan Kitwood/Getty Images)
LONDON, UNITED KINGDOM - FEBRUARY 05: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince Harry, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge join a Team Heads Together London Marathon Training Day at the Queen Elizabeth Olympic Park on February 5, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
The Duke and Duchess of Cambridge and Prince Harry leaving the Institute of Contemporary Art in London where they outlined the next phase of their mental health Heads Together campaign.
Catherine Duchess of Cambridge, Prince William, Duke of Cambridge and Prince Harry visit the Visitors Centre during the Somme centenary commemorations at the Thiepval memorial in France on July 01, 2016
The Duke and Duchess of Cambridge and Prince Harry at the Patron's Lunch in The Mall, central London in honour of the Queen's 90th birthday, in an open topped Range Rover.
Prince Harry, the Duke and Duchess of Cambridge leave St Paul's Cathedral in London following a national service of thanksgiving to celebrate the 90th birthday of Queen Elizabeth II.
Prince William, Duke of Cambridge, Prince Harry and Catherine, Duchess of Cambridge, wearing a skirt by Banana Republic and a blouse by GOAT Fashion, arrive to attend the launch of the
Heads Together campaign at Olympic Park in London on May 16, 2016
The Duke of Cambridge (left), The Duchess of Cambridge (centre) and Prince Harry (right) attend the World Premiere of Spectre, held at the Royal Albert Hall in London.
The Duke and Duchess of Cambridge and Prince Harry arriving for the annual Commonwealth Day service at Westminster Abbey, London, on Commonwealth Day.
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince Harry visit The Tower Of London's Ceramic Poppy installation 'Blood Swept Lands and Seas of Red' by artist Paul Cummins, commemorating the 100th anniversary of the outbreak of First World War.
The Duke and Duchess of Cambridge and Prince Harry watch riders at the finish line of Stage 1 of the Tour de France in Harrogate.
Prince Harry, the Duchess of Cambridge and the Duke of Cambridge watch a fly-past by the RAF on the balcony at Buckingham Palace following the Trooping the Colour parade, London.
Prince Harry, the Duchess and Duke of Cambridge with their wands on the set used to depict Diagon Alley in the Harry Potter Films during their visit to Warner Bros studios in Leavesden, Herts where the popular movies were produced.
The Duke and Duchess of Cambridge watch with Prince Harry during the Team Eventing Jumping Final on day four of the London Olympic Games at Greenwich Park, London.
The Duke and Duchess of Cambridge and Prince Harry chat with children during a visit to Bacon's College in Greenwich, London, where they attended the launch of a new sports project that aims to train the next generation of sports coaches.
Prince William (left), Catherine, Duchess of Cambridge and Prince Harry stand on the balcony at Buckingham Palace during the Diamond Jubilee celebrations in central London.
The Duke and Duchess of Cambridge talks to Prince Harry before a reception in the Waterloo Chamber, before her Sovereign Monarchs Jubilee lunch at Windsor Castle.
Prince William and his bride Kate leave Westminster Abbey, London, after their wedding, followed by Prince Harry (rear, left) and Pippa Middleton (rear, right).
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Harry reportedly worked on his speech with best friends Thomas Van Straubenzee and Guy Pelly and was prepared to tone it down if his grandmother, The Queen, attended. She ended up skipping the evening portion of the event, though.
William and Prince Charles had their moments to poke fun earlier in the weekend at the wedding breakfast.
"The thing about growing older is that your children get taller than you so they can see your bald spots. Now in my case, I can see his," Charles joked about William, The Mail on Sunday reported. William responded: "You got there before Harry!"
William and Harry's speeches both reportedly included references to their late mother, Princess Diana, as well.
When his speech was over, Harry, in a pro best man move, insisted that bacon and sausage sandwiches were available at the end of the reception, The Telegraph reported.
The final details before the big day!
Royal wedding 2018: Final details
Royal wedding 2018: Final details
The guest list
Although the guest list hasn't officially been released -- and we won't know for sure who made the cut until the big day -- many high-profile figures have hinted whether or not they scored an invite.
Priyanka Chopra, Serena Williams and David and Victoria Beckham are all expected to attend, alongside Meghan's Suits co-stars Patrick J. Adams and Gabriel Macht.
Since Harry isn't heir to the throne, they aren't expected to invite anybody on an official capacity. President Trump, Melania Trump and the Obamas are not expected to attend.
The page boys and bridesmaids
Just a few days before the big day, Prince Harry and Meghan finally revealed who would be part of their pack of bridesmaids and page boys. As expected, two of Duchess Kate and Prince William's children, Prince George and Princess Charlotte, will take part. Other bridesmaids include Harry's goddaughters Florence van Cutsem and Zalie Warren, Meghan's goddaughters Remi and Rylan Litt, as well as Jessica Mulroney's daughter Ivy.
Along with Prince George, page boys include Brian and John Mulroney and Jasper Dyer.
The first dance
The royal couple has chosen quite an unexpected song for their first dance. According to reports, Harry and Meghan will take the dance floor as man and wife, dancing to Whitney Houston's hit "I Wanna Dance With Somebody.”
In a press release from April 1, it was announced that the couple had chosen Philippa Craddock to design their flowers for the church ceremony.
"Where possible, Philippa will use flowers and plants that are in season and blooming naturally in May, including branches of beech, birch and hornbeam, as well as white garden roses, peonies and foxgloves,” the press release said.
In March, it was announced that Claire Ptak would be the baker behind Meghan and Harry's wedding cake. The elderflower-flavored creation will incorporate the bright flavors of spring, and "be covered with buttercream and decorated with fresh flowers."
Claire's creations were already on Meghan's radar: She interviewed the baker for her lifestyle blog The Tig, which has since been shut down.
Meghan and Harry will ride in the Ascot Landau, a horse-drawn carriage built in 1883, while departing St. George's chapel following the ceremony. It'll take then through Castle Hill to Windsor Castle. If it rains, they'll have to switch to the Scottish Stage Coach, which was built in 1830 and offers a covering.
In late April, it was revealed that Prince Harry and Meghan have hand-selected a number of choirs and musicians to perform on their big day.
According to US magazine, "The performers are Vivian’s choir; 19-year-old cellist Sheku Kanneh-Mason; Karen Gibson and The Kingdom Choir; an orchestra made up of musicians from the BBC National Orchestra of Wales, the English Chamber Orchestra and the Philharmonia; Welsh soprano Elin Manahan Thomas; trumpeter David Blackadder; organist Luke Bond; and State Trumpeters from the Band of the Household Cavalry."
The night before
According to reports, Meghan and Harry will spend the night before their wedding apart, in two different lavish hotels in London.
Meghan will stay with her mother, Doria, at Cliveden House Hotel. Prince Harry will be joined by brother and best man Prince William at Cosworth Park.
Following the service, there will be two receptions. The first will be held at St. George's hall for the guests from the ceremony. The second celebration will be held at Frogmore house for a more select group, including the couple's family and friends.
Not only will the receptions be joined by food trucks (!) but the dishes served will include "the freshest produce" sourced from places like Her Majesty's estates. One item on the menu? Seasonal bowls.