Julia Roberts, Tom Hanks, Jennifer Aniston and Taylor Swift are among the celebrities who have lent their support to Oprah Winfrey's campaign to end loneliness.

The Tv mogul released a video titled Just Say Hello on Tuesday (18Feb14) to encourage people to reach out and connect with others.

She has enlisted a number of her famous friends to take part in the video, also including fellow Tv host Ellen DeGeneres, actor Seth Rogen, talk show host Jimmy Kimmel and singer John Legend.

The stars make a brief appearance on screen to prove how easy it is say hello to someone in need of company.