Pregnant Kate Middleton is going to be godmother. The Duchess of Cambridge has signed on to be the "godmother" of one of Princess Cruise ships, according to a release on Tuesday.

"It is a great honor for Princess Cruises that Her Royal Highness The Duchess of Cambridge has accepted our invitation to become the Godmother to Royal Princess," Alen Buckelew, the line's president and CEO, said in a statement.

Middleton, the wife of Prince William and soon-to-be mother will perform her duties on June 13 in a combination of weeklong events that will welcome the line's newest ship. This is the third vessel in the line to carry the name Royal Princess. The first Royal Princess joined the fleet in 1984, and was inaugurated by Prince William's mother, the late Princess Diana.

"We are delighted that the Duchess will launch our new ship and can think of no better way to celebrate our company's British heritage and our commitment to the country."

The Royal Princess has been under construction since March 2011 and has been held at the Fincantieri shipyards in Monfalcone, Italy. The ship holds passengers, and it weighs 141,000 ton. It is the first of two new ships marking a new design for the line. The ship will sail two short crusies followed by Mediterranean cruises in the summer followed by eastern Caribbean cruises from Port Everglades in Fort Lauderdale beginning in October, according to E! News.

See photos of the cruise ship here:

Although she nor Prince William have yet to confirm whether she is having a boy or girl, she revealed that she refers to her unborn baby as the couple's "little grape."

"We have a short list for both [boy and girl] but it's very difficult," she told a group of fans. "My friends keep texting me names."

Enstars reported earlier that Middleton is enjoying her pregnancy, as she was recently spotted playing basketball and pingpong during a recent visit to a homeless shelter in Scotland.

Middleton also gave reporters a hint on when the royal baby will arrive.

"It's around mid-July but apparently babies have their own agenda," she said.

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