Mary Elizabeth Winstead has insisted she did not expect another Die Hard film.
The Smashed star is reprising her role as John McClane's daughter Lucy in Bruce Willis' fifth movie about the disaster-saving cop.
She said: "It's a very brief appearance but it was really fun to reprise the father-daughter rapport."
Bruce made the first Die Hard movie in 1988.
Mary Elizabeth added: "I keep thinking it's got to be the last one, I thought the last one was gonna be the last one. So who knows... as long as Bruce is still up for it, I'm sure they'll keep making them."
The 27-year-old actress plays a functioning alcoholic teacher in new film Smashed, which follows the character's downward spiral and her attempt to rehabilitate herself.
Mary Elizabeth revealed she went to a lot of Alcoholics Anonymous meetings in Los Angeles to research the role and said: "I saw very different sides of alcoholism and that made it clear to me there is no one face of alcoholism, it's pretty universal struggle and their struggles are no different than mine."
She revealed the subject matter made it a challenge to play her character both drunk and sober, but the drunk parts were more nerve racking.
She said: "They were both really challenging. Drunk was more terrifying.
"Any actor is terrified of playing drunk - it's so easy to get wrong, sometimes it doesn't work - it just feels fake, and forced. And then if you actually try to get drunk, you're not performing the scene well and you're just a mess. So that was the scarier part, for sure."