Prince Harry and Meghan Markle have plans to add to their growing family. A royal correspondent reported that the Duke and Duchess of Sussex could be having a second child by 2020. 

Royal expert Katie Nicholl told Entertainment Tonight that Prince Harry and Meghan are both on the same page when it comes to having a large family. After the birth of their first child, Archie Harrison, the Sussex royals intend to give him a brother or sister perhaps by next year. 

"They absolutely want siblings for Archie, so possibly we will have a pregnancy announcement -- a second pregnancy announcement for Meghan and Harry sometime next year," Nicholl said. "But, for the moment, the focus is obviously on Archie." 

The former actress gave birth to her son with Prince Harry last May 6 and the baby will have his baptism on Saturday, July 6 or two months after he was born. The private ceremony will only have close to 25 guests, according to reports and the Queen won't likely be in attendance. 

Archie will be christened at St. George's Chapel in Windsor, where his parents had gotten married and where his father was also baptized in 1984. Photos from Archie's baptism will likely be released to the public a few days after the event. 

The Sussex couple has not released a list of godparents. In a media advisory announcing the baptism, Prince Harry and Meghan stated that this detail will also be kept private. 

The royals are determined to raise Archie as a private citizen and has also opted not to use a title for their son. Since he is not in the immediate line to succeed the Queen, they want Archie to have a normal childhood as much as possible. The baby is the seventh in line to the throne after his father, uncle Prince William, and cousins -- Prince George, Princess Charlotte and Prince Louis.

Meanwhile, during a speech before the National Youth Mentoring Summit, Prince Harry paid tribute to his mother, who would have been 58th on her birthday last July 2. The prince said that he's learned a new meaning for what it means to be a "role model" now that he is a dad. 

"It's the newfound clarity I have as a father knowing that my son will always be watching what I do, mimicking my behavior, one day maybe even following in my footsteps," Prince Harry said. "But it's not just my role as a father that shows me that;  it's in the people I see every day that don't realize how inspirational they are to those watching," per Telegraph.