(Cover) - EN Showbiz - Rose Byrne thinks her ambition may have had a negative impact on her personal life.

The 31-year-old Australian actress dated director-and-actor Brendan Cowell for over six years although their relationship ended in January 2010. Rose has been concentrating on her career lately, and she admits she sometime worries about her future in movies more than her love life.

Im sure relationships of mine have suffered in the past because Ive been so focused on work, she told Total Film.

The gorgeous stars career has been going from strength to strength recently, and this year she will appear in action movie X-Men: First Class alongside A-listers including James McAvoy, January Jones and Kevin Bacon. The actress feels proud of how hard she has worked to make it in Hollywood, and plans to have a lengthy career.

Its simple things, like cutting holidays short to come back for an audition. That to me is real ambition - and hanging in there when Ive thought that I might not work again. I have endurance. I stick around... she added. (C) Cover Media