The actress will play Ann, the wife of Bobby Ewing (Patrick Duffy), in TNT's upcoming revamp of the classic series.
Strong has now told TV Guide that there are a number of differences between Ann and her Desperate Housewives character Mary Alice Young.
"Mary Alice in a lot of ways was very restricted in her ability to be expressed because she did kill herself in the first episode," she explained. "My hands have been a bit tied and I feel like the gloves have just come off [in Dallas]."
Strong continued: "Even though I'm Bobby Ewing's wife, she is not a wallflower. This is a woman who's got resources of her own and is really complex and fiercely loyal and one to be reckoned with. I think she will be able to go toe-to-toe with JR if push comes to shove."
Strong is filming Dallas while working on the final season of Desperate Housewives, in which she is expected to have a bigger on-screen presence.
However, Strong revealed that she is enjoying working on both shows, saying: "It's been an insane creative convergence. A multiplicity of good fortune."
Strong has previously described Ann Ewing as "kind of like the new Miss Ellie" and has claimed that the new series of Dallas is a "continuation" rather than a remake.
The show is due to premiere in summer 2012.
Watch a trailer for Dallas below: