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OTRC: Joseph Gordon-Levitt talks 'Looper,' playing younger 'Bruce Willis': 5 facts

Bruce Willis and Joseph gordon-Levitt appear in a scene from the 2012 film 'Looper.' / Joseph Gordon-Levitt talks to OTRC.com about the film 'Looper' ahead of its release on Sept. 28, 2012. (Alan Markfield / DMG Entertainment / TriStar Pictures)

Joseph Gordon-Levitt says the casting of Bruce Willis as the older version of himself in the new sci-fi film "Looper" was a "big fist pump moment."

The movie is set in 2042. Gordon-Lewitt's character, Joseph Simmons, is a Kansas City mafia member and an assassin known as a Looper, who is paid to kill agents sent back in time by their employers. He is shocked to discover that his newest target is his older self. The film also stars Emily Blunt and is directed by Rian Johnson. It hits theaters on September 28.

Check out 5 facts about Joseph Gordon-Levitt and "Looper."

1. Bruce Willis was a surprise addition to "Looper."

"We didn't know it was going to be Bruce," Gordon-Lewitt, 31, told OTRC.com host Rachel Smith. "I've been involved with 'Looper' for many years. Rian and I are dear friends and he showed me the script several years ago. It wasn't until later that Bruce got involved, which was a huge victory for us, big fist pump moment, which was followed shortly thereafter by me going like, 'Wow, how am I going to do this?'"

2. Joseph Gordon-Lewitt used his iPod to study Bruce Willis' voice.

"I would watch his movies," he said. "I would rip the audio off of his music and listen on my iPod. He even recorded some of the voiceover lines for me and sent those to me so I could hear how it would sound in his voice."

3. Joseph Gordon-Levitt says Bruce Willis gave him the thumbs up when it came to impersonating him.

"He doesn't give those lightly," Gordon-Levitt added about the 57-year-old actor. "He's a very understated guy. He's just really soft-spoken and just so honest. He's the kind of guy that doesn't have anything to prove, so he won't butter you up or just say things to make you feel good. If he compliments you, he really meant, 'Yeah.' And it really meant a lot when he was like, 'Wow, you sound like me.'"

4. Working on "Looper" brought back childhood memories for Joseph Gordon-Levitt.

"Looper" stars child actor Pierce Gagnon, who played Logan on the CW show "One Tree Hill."

Gordon-Levitt is also a former television actor. He made his on-screen debut in 1988 with a part in the TV movie "Stranger on My Land" and a recurring role on the Michael J. Fox comedy series "Family Ties." In the 1990s, Gordon-Lewitt played Daniel Collins on the show "Dark Shadows" and George on "Roseanne" before he was cast in what became his breakout role - alien teenager Tommy Solomon on the sitcom "Third Rock From The Sun."

"He's a fantastic actor," Gordon-Levitt told OTRC.com about Gagnon. "He was 5 when we were shooting. I was 6 when I started as an actor, so it brought back a lot of memories for me."

" I was so proud of him," he added. He just came in and killed it. Never made us treat him like a kid. He always just earned our respect as a peer and a colleague and he just did a great job."

5. Joseph Gordon-Levitt has no plans to shake it on the big screen.

Joseph Gordon-Levitt showcased some sexy dance moves (and a killer body) during a recently "SNL" hosting stint when he participated in a sketch spoofing the male stripper film "Magic Mike." However, the actor has no plans to star in a sequel to the popular summer movie.

" I think I was just trying to make people laugh," he said.

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