Mills, 39, is expected to join boxer Laila Ali, former "Beverly Hills, 90210" star Ian Ziering and singer Billy Ray Cyrus in New York on ABC's "Good Morning America" next week, when "Dancing" alum Jerry Springer will announce the new celebrity contestants, the New York Post said Thursday.
In London, Mills met with police Wednesday to discuss "a number of issues," a police spokesman told the Times of London said, E! News said.
Mills' spokesman, Phil Hall, said he thought the meeting may have been related to death threats sent to her since she and McCartney announced their separation in May.
Also, London police are investigating an incident in which Mills allegedly kicked a photographer.