Hayden Panettiere is boss in Wladimir Klitschko romance

Hayden Panettiere has given fans a cheeky insight into her relationship with boxing hunk Wladimir Klitschko, revealing she is the dominant partner and has nicknamed him 'Borat' because of his Kazakhstani roots.

The former Heroes star first began dating the man-mountain heavyweight in 2009 but they split in 2011 before reconciling earlier this year (13).

Despite their massive size difference, the diminutive blonde is adamant she is the boss in their romance and frequently teases him about his upbringing.

She has nicknamed him Borat after Sacha Baron Cohen's bungling Kazakh journalist, and she even tried to get him to wear the character's famous bright green 'mankini' swimsuit.

Panettiere tells U.K. talk show host Graham Norton, "I am in charge and can throw him around like a rag doll. He was born in Kazakhstan so I call him Borat. I even tried to get him the bathing suit!"