Former Vice President Dan Quayle will endorse Mitt Romney Tuesday at a campaign event in Arizona, ABC News has been told.

The Associated Press was first to report the endorsement.

Quayle served as Vice President during President George H.W. Bush's administration and prior to that served as a U.S. Senator from Indiana. He also served as a member of the U.S. House of Representatives.

The endorsement will be made official at a campaign event in Paradise Valley, Ariz., near to where Quayle now lives.