The 31 year-old made her first public appearance with Alex Beh recently when they participated in the Dodge Rock 'n' Roll Los Angeles Half Marathon.
When asked why they decided to do it, the Ghost Whisperer star told UsMagazine.com: 'We're crazy. We are really excited about all the charities involved, and we heard the Rock 'n' Roll marathon was really fun and just sort of silly and a great way to stay in shape.'
The pair met through friends at a dinner party and Beh said what attracted him most to Hewitt was her eyes and beauty.
Hewitt joked: 'My running ability!'
To which Beh replied: 'Yes, her running ability...It was her eyes, and really, we just laugh the whole time.'
Hewitt added: 'We laugh a lot ... he's hilarious!'