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 Playboy in 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."

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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!

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Joseph Gordon-Levitt on life as a new dad: 'It makes me really happy'
Actor Joseph Gordon-Levitt poses for the media on top of the Empire Tower before the premiere of 'The Walk' at the Moscow International Business Center, Russia, Thursday Oct. 8, 2015. (AP Photo/Alexander Zemlianichenko)
Joseph Gordon-Levitt attends the New York Film Festival opening night gala premiere for "The Walk" at Alice Tully Hall on Saturday, Sept. 26, 2015, in New York. (Photo by Charles Sykes/Invision/AP)
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)
Actor Joseph Gordon-Levitt attends an NBA basketball game between the Phoenix Suns and the Los Angeles Lakers, Sunday, March 30, 2014, in Los Angeles.(AP Photo/Gus Ruelas)
Joseph Gordon-Levitt arrives at the premiere of "White Bird in a Blizzard" at the ArcLight Hollywood on Tuesday, Oct. 21, 2014, in Los Angeles. (Photo by Todd Williamson/Invision/AP)
Joseph Gordon-Levitt arrives at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
Joseph Gordon-Levitt arrives at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
Joseph Gordon-Levitt, the creator, director, host and executive producer of the online variety series "HITRECORD ON TV," introduces a screening of the show at the 2014 Sundance Film Festival on Friday, Jan. 17, 2014 in Park City, Utah. (Photo by Chris Pizzello/Invision/AP)
FILE - In this Jan. 18, 2013 file photo, director, writer and cast member, Joseph Gordon-Levitt, poses at the premiere of "Don Jon's Addiction" during the 2013 Sundance Film Festival in Park City, Utah. The movies that populate independent film festivals continue to elicit lead actors hoping to foster career shifts. Robert Redford's Sundance, kicking off it's 30th year on Thursday, Jan. 16, 2014, in Park City, Utah, continues to attract the crux of the film business. As actors Kristen Stewart and Gordon-Levitt have learned, the indie fest is the ideal place to cast a new net. (Photo by Danny Moloshok/Invision/AP, File)
Joseph Gordon-Levitt attends the "Don Jon" premiere on Thursday, Sept. 12, 2013 in New York. (Photo by Charles Sykes/Invision/AP)
Joseph Gordon-Levitt arrives at the MTV Video Music Awards on Sunday, Aug. 25, 2013, at the Barclays Center in the Brooklyn borough of New York. (Photo by Evan Agostini/Invision/AP)
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)
Joseph Gordon-Levitt poses in the press room with the award for outstanding creative achievement in interactive media for Pivot TV’s “HitRecord on TV” at the 2014 Creative Arts Emmys at Nokia Theatre L.A. LIVE on Saturday, Aug. 16, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
Joseph Gordon-Levitt arrives at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
Joseph Gordon-Levitt poses in the press room during the Oscars at the Dolby Theatre on Sunday, March 2, 2014, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
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