Washington DC, Sept. 18 -- Actor Josh Duhamel shared that playing a troubled father in his new film, 'London Calling', taught him an important lesson on parenting, E! News reported.

'London Calling' is an action comedy film directed by Allan Ungar and written by Omer Levin Menekse, Quinn Wolfe and Ungar. It stars Josh Duhamel, Jeremy Ray Taylor, Rick Hoffman, and Aidan Gillen.

'The Transformers' actor, who shares son Axl, 12, with his ex-wife Fergie, as well as son Shepherd, 20 months, with wife Audra Mari, said,"It was fun to look at some of the things that I could even do better as a dad," adding, "I work a lot, and I often have a lot of guilt about not being there as often as I could be."

However, he shared that he's grateful to be ...