Photo: Alberto E. Rodriguez/Getty; Mike Coppola/Getty

Prince Harrywasn’t the only royalty in the building ofThe Late Show with Stephen Colbertlast night.
The Duke of Sussex, 38, joined the talk show Tuesday to promote his memoir,Spare,on the day of its global release, appearing oppositeTom Hanksin a lighthearted skit at the opening of the episode.
At the start of the segment, Colbert waited in a hallway with two trumpet heralds wearing “LS” (apparently standing forLate Show) on their chests.
“Where is he?” Colbert asked, acting annoyed. “He’s coming,” said a staffer who ran past, prompting the musicians to begin to play.
WhenPrince Harryturned around the corner, he said, “Whoa, whoa, whoa, stop, stop! Stephen, not needed, but thank you, I appreciate it.”
“What are you talking about? This isn’t for you,” Colbert, 58, said of the regal welcome. “Get out of the way. He’s coming!”
Strolling into view, Hanks joked, “I’m back! where’s my fanfare?” as the comedian saluted, the trumpeters played and Harry threw red petals at the Oscar winner, who appeared onThe Late ShowMonday.

The playful spot prefaced Prince Harry’s sit-down interview with the host, which had a more serious tone. Harry discussed the “cathartic” process of writingSpare, hismilitary service in Afghanistan, the worldwide fascination with the royal family and what Princess Diana would make of it all today. He also said that a rift wouldn’t have driven him andPrince Williamapart if their mother was still alive.

“If your mother were still alive, do you ever think about how she might handle this moment?” Colbert asked Harry, referencing the tension between him and the Prince of Wales.
“We wouldn’t have got to this moment,” Harry replied. “It’s impossible to say where we would be now — where those relationships would be now — but there is no way that the distance between my brother and I would be the same.”
The book jacket of Prince Harry’s memoir ‘Spare’.PENGUIN RANDOM HOUSE

For more fromPEOPLE’s exclusive interview with Harry, check out this week’s issue, on newsstands Friday
Jenna Jones

Prince Harrycoversthis week’s exclusive issue of PEOPLE, where he opened up about mourning his mother, who died in a Paris car crash in 1997 at age 36.
“I struggled for years to accept or even speak about my mother’s death. I was unable to process that she was gone. I’m not sure anyone can ever truly have closure when they lose a parent, or anyone for that matter, especially when that grief may be the only thing left of them,” he tells PEOPLE of grieving Diana.
“The healing process has allowed me to get to a place where I now feel the presence of my mum more than ever before,” Harry says. “She’s with me all the time — my guardian angel.”
source: people.com