Public speaking is a huge industry in and of itself.
Celebrities, politicians, advocates, and activists can be paid large sums of money to speak out on key issues or on their own experiences.
The latest celebrities to join this ever-growing industry are former senior members of the Royal Family, the Duke and Duchess of Sussex.
Prince Harry and Meghan Markle have started a new life in Los Angeles in the US and are now reported to have signed a deal with New York-based Harry Walker Agency.
Described as the leading speaker's agency in the world, Harry Walker say of themselves: "No other agency in the world has access to the breadth and caliber of speakers that we do.
"We have long-standing and exclusive relationships with hundreds of speakers worldwide, including World Leaders, Nobel Laureates, Journalists, Bestselling Authors, Global Business Leaders, Economists, and the biggest names in television, film, music, sports, media and more."
It is unknown how high the fee will be for Harry and Meghan to speak, but they will be doing so both together and individually.
Both clearly have issues that they are passionate about and have already made public appearances regarding these.
Expect a focus on social injustice issues like racial inequality, mental health, and women's rights.
Harry spoke about the importance of therapy back in February when appearing at banking giant JP Morgan for a reported £400,000, and is said to be in talks for a partnership with Goldman Sachs.
So, who are the sort of famous faces that Meghan and Harry will be joining the ranks of?
Barack Obama and Michelle Obama
President of the United States of America from 2008 to 2016, Barack Obama became an instant icon across the world, as did his intelligent and charismatic wife, Michelle Obama.
Now the former President and former First Lady are signed with the Harry Walker Agency for public speaking across a variety of social and political issues, along with discussing their own personal experiences.
It was reported that the former President earned £320,000 for a public appearance back in 2017.
With six-figure salaries for appearances alongside a lucrative book deal - worth a reported £49million with Penguin Random House - and producing documentaries, the Obamas are working to reach people on the issues that matter to them.
Bill Clinton and Hillary Rodham Clinton
Another former President of the United States of America, Bill Clinton served as Commander and Chief from 1993 to 2001.
After his presidency, Clinton went on to found the charitable organization the Clinton Foundation.
At Bill's side through this is his wife and fellow politician, Hillary Rodham Clinton.
The former First Lady has also served as a US senator, the US Secretary of State, and a candidate for the US presidency.
It is reported that they earned £200,000 per appearance in 2014, and following the 2016 election, it is likely attention for the pair is only higher.
It was reported during the election that Bill and Hillary accrued more than $153 million in paid speeches from 2001 until Hillary launched her campaign.
The pair still make public speeches and have been the focus of various documentaries and books.
Having served as Prime Minister of the United Kingdom and Leader of the Labour Party from 1997 to 2007, Tony Blair was certain to be a hot property when it came to the public speaking circuit. Having created his own non-profit organization The Tony Blair Institute for Global Change, Mr. Blair says he has focused on the need for globalization and innovation and making these work for the many and not the few.
There has been a range of stories since Blair left the role fo PM that claims he has been paid six-figure deals for public appearances, reportedly earned £330,000 for a single talk in 2015, and nearly £400,000 for two 30-minute speeches in 2009.
He also hasn't stayed quiet on criticizing the Prime Ministers who followed him and criticized Labour Party policy under Jeremy Corbyn.
Tina Fey and Amy Poehler
The comedian, actress and writer Tina Fey is also signed to the Harry Walker Agency and has appeared at talks for Hamilton College, The Richmond Forum, RSA Security, SAP America, Inc., and Chief.
Similarly, Tina's friend and fellow comedy legend Amy Poehler is also signed and has spoken at Harvard University, Vulture Festival, Jewish United Fund of Metropolitan Chicago, and BUILD Series.
It is estimated that the pair each earn upwards of $100,000 for an appearance, according to Celebrity Speakers Bureau.
Award-winning actor, lyricist, composer, and writer Lin-Manuel Miranda is the man behind super hit musical Hamilton and is now a Hollywood star.
Signed up with the Harry Walker Agency, Miranda has hosted talks for the likes of Qualtrics and Workday.
He is described as being "a passionate and dedicated philanthropist" who is "instrumental in providing support for Puerto Rico and is a vocal advocate for equality nationwide".
A film version of Miranda's musical Hamilton arrives on Disney+ on July 3.
The Terminator star and former Republican Governor of California, Arnold Schwarzenegger is very much in demand.
According to The Street, Arnie earns $250,000 per speech when he makes a public appearance. Continuing to be a visible film star - he was in Terminator: Dark Fate last year - he now is believed to have an estimated NET worth of $400 million, according to Men's Health. While much of this will come from his film career, we can't imagine his public speaking has damaged his bank account, either!