Pregnant Kate Middleton will prepare for one of her last official public engagements before she gives birth, when she christens a royal cruise ship Thursday. 

The Duchess of Cambridge, 31, will serve as the godmother of Royal Princess from Princess Cruises on June 13. The ceremony will take place in Southampton, UK at 11:30 am UK/ 6:30 am EST.

Click here at Princess Cruises to watch the live stream of the ceremony. 

The wife of Prince William follows in the footsteps of Princess Diana, Margaret Thatcher and others who have all served as godmothers to ships in the Princess line.

"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 back in April. "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."

At Thursday's ceremony, British singer Natasha Bedingfield will perform her hit-song, Unwritten and other British ship-naming traditions will take place including performances by The Band of Her Majesty's Royal Marines Portsmouth (Royal Band) and the pipers of the Irish Guard. 

The Royal Princess has been under construction since March 2011. The new ship will hold 3,600 passengers and weighs 141,000 ton. Some of the special features on board include a large piazza-style atrium that will serve as a gathering point, an over-water SeaWalk, a glass-bottomed walkway on the top deck that extends 28 feet beyond the ship's edge, a plush top deck pool with poolside cabanas and balconies on all outside staterooms, and a private dining experience.

Royal Princess is scheduled to depart on Sunday for its maiden voyage, to Barcelona, Spain. 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 the fall.