The 70-year-old Sobers will open the 16-team event in Jamaica on March 11.
"It's a great honour to declare the Cricket World Cup open. I'm taking it in my stride and I'm looking forward to the occasion," said Sobers from his home in Barbados.
The former West Indies skipper said he was excited that cricket's showpiece event was coming to the region for the first time.
"It will be phenomenal for the Caribbean, especially for those people who haven't had the opportunity to see a Cricket World Cup. It will be a fantastic experience."