Joseph Gordon-Levitt on life as a new dad: 'It makes me really happy'

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Joseph Gordon-Levitt Gushes About Being a First Time Dad

In his new film The Walk, Joseph Gordon-Levitt plays a daredevil who traverses a high wire suspended between the Twin Towers. But in real life, the actor is taking on an adventure of his own: fatherhood!

"It's wonderful and it makes me really happy," the 34-year-old actor -- who welcomed a baby boy with wife Tasha McCauley in August -- gushed to ET. "I am just so happy."

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Gordon-Levitt and his wife are notoriously private, keeping the big news under wraps, just like they did with their December 2014 wedding.

"It wasn't that difficult because we didn't tell many people about it," he said of the wedding in an interview with Playboyin September. "As much as some people may disagree, I don't believe a person's private life -- even a person in entertainment -- is a public performance."

While The Walk is family-friendly fare, Gordon-Levitt said he's not sure how being a dad will affect his choice of roles moving forward.

"I don't know," he admitted. "We will see."

WATCH: How Joseph Gordon-Levitt Recruited Anne Hathaway, Mindy Kaling & More for 'Hit Record on TV' Season 2

The film is based on the real-life 1974 feat of high-wire artist Philippe Petit, who worked with Gordon-Levitt to help him learn how to balance for his portrayal and called him after watching the film to tell him he thought the performance was "beautiful."

"Not everyone who is good at doing something is good at teaching that thing but he was a great teacher," Gordon-Levitt said of Petit. "He really believed that I could do it. And he convinced me that I could do it. Once I believed that I could do it, then I could."

WATCH: Joseph Gordon-Levitt Is a New Dad!

See photos of Joseph Gordon-Levitt below:

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Joseph Gordon-Levitt on life as a new dad: 'It makes me really happy'
LOS ANGELES, CA - DECEMBER 03: Actor Joseph Gordon Levitt signs and discusses his new DVD 'HitRECord On TV: Season One!' at Skylight Books on December 3, 2014 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - DECEMBER 03: Actor Joseph Gordon Levitt signs and discusses his new DVD 'HitRECord On TV: Season One!' at Skylight Books on December 3, 2014 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - DECEMBER 03: Actor Joseph Gordon Levitt signs and discusses his new DVD 'HitRECord On TV: Season One!' at Skylight Books on December 3, 2014 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt on stage at the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - MARCH 02: Actors Joseph Gordon-Levitt and Emma Watson speak onstage during the Oscars at the Dolby Theatre on March 2, 2014 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
SANTA MONICA, CA - MARCH 01: Actor/screenwriter Joseph Gordon-Levitt attends the 2014 Film Independent Spirit Awards at Santa Monica Beach on March 1, 2014 in Santa Monica, California. (Photo by Steve Granitz/WireImage)
LONDON, ENGLAND - OCTOBER 16: Joseph Gordon-Levitt attends a screening of 'Don Jon' during the 57th BFI London Film Festival at Odeon West End on October 16, 2013 in London, England. (Photo by Ferdaus Shamim/WireImage)
PARK CITY, UT - JANUARY 23: Joseph Gordon-Levitt seen on January 23, 2013 in Park City, Utah. (Photo by Robin Marchant/FilmMagic)
PARK CITY, UT - JANUARY 18: Actor/director Joseph Gordon-Levitt attends 'Don Jon's Addiction' Premiere during the 2013 Sundance Film Festival at Eccles Center Theatre on January 18, 2013 in Park City, Utah. (Photo by C Flanigan/FilmMagic)
HOLLYWOOD, CA - OCTOBER 21: Actor Joseph Gordon-Levitt attends the premiere of 'White Bird in a Blizzard' at ArcLight Hollywood on October 21, 2014 in Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
HOLLYWOOD, CA - OCTOBER 21: Actor Joseph Gordon-Levitt attends the premiere of 'White Bird In A Blizzard' at ArcLight Hollywood on October 21, 2014 in Hollywood, California. (Photo by Jason Kempin/Getty Images)
HOLLYWOOD, CA - OCTOBER 17: Craig Robinson (L) and Joseph Gordon-Levitt attend the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt on stage at the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt attends the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Michael Buckner/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt on stage at the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Michael Buckner/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt on stage at the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actors Craig Robinson (L) and Joseph Gordon-Levitt on stage at the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
HOLLYWOOD, CA - OCTOBER 17: Actor Joseph Gordon-Levitt (L) and writer/director Judd Apatow attend the 3rd Annual Hilarity for Charity Variety Show to benefit the Alzheimer's Association, presented by Genworth, at Hollywood Palladium on October 17, 2014 in Hollywood, California. (Photo by Jeff Vespa/Getty Images for Hilarity For Charity)
NEW YORK, NY - OCTOBER 07: Anthony Mackie, Seth Rogen, Joseph Gordon-Levitt filming Johnathan Levine's 'Untitled Christmas Eve Project' on October 7, 2014 in New York City. (Photo by Steve Sands/GC Images)
NEW YORK, NY - SEPTEMBER 02: Actor Joseph Gordon-Levitt on the set of 'Christmas Eve Project' on September 2, 2014 in Brooklyn, New York. (Photo by Bobby Bank/GC Images)
NEW YORK, NY - SEPTEMBER 02: Actor Joseph Gordon-Levitt on the set of 'Christmas Eve Project' on September 2, 2014 in Brooklyn, New York. (Photo by Bobby Bank/GC Images)
NEW YORK, NY - SEPTEMBER 02: Actor Joseph Gordon-Levitt on the set of 'Christmas Eve Project' on September 2, 2014 in Brooklyn, New York. (Photo by Bobby Bank/GC Images)
NEW YORK, NY - AUGUST 19: Joseph Gordon-Levitt leaves the 'Late Show with David Letterman' at Ed Sullivan Theater on August 19, 2014 in New York City. (Photo by Donna Ward/Getty Images)
NEW YORK, NY - AUGUST 19: Actor Joseph Gordon-Levitt enters the 'Late Show With David Letterman' taping at the Ed Sullivan Theater on August 19, 2014 in New York City. (Photo by Ray Tamarra/WireImage)
NEW YORK, NY - AUGUST 19: Joseph Gordon-Levitt leaves the 'Late Show with David Letterman' at Ed Sullivan Theater on August 19, 2014 in New York City. (Photo by Donna Ward/Getty Images)
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