Scarlett Johansson has reportedly postponed her wedding - because it clashes with the U.S presidential elections.

The actress - who has publicly backed Barack Obama - is due to marry Ryan Reynolds this year.

But Johansson has put the nuptials on hold - because her twin brother, Hunter, is busy working on Obama's campaign.

A source tells British newspaper the Daily Express, "He is working all the time so Scarlett wants to hold off until the election is over."

The election is due to take place in November.