"She's the greatest thing that ever happened to me," he said. "I'm kind of really grateful that I met before anything kind of happened because everything that's happened in my career and on screen, off screen we've always done it together."
See more photos of the couple through the years below:
Hugh Jackman and wife through the years
Hugh Jackman gushes over wife: 'She's the greatest thing that happened to me'
Hugh Jackman and Deborra-Lee Furness attend a screening of "Dukale's Dream" at the SVA Theater on Thursday, June 4, 2015, in New York. (Photo by Charles Sykes/Invision/AP)
Hugh Jackman and Deborra-Lee Furness attend the Donna Karan 30th Anniversary fashion show during Mercedes-Benz Fashion Week on Monday, Feb. 10, 2014, in New York. (Photo by Omar Vega/Invision/AP)
Actors Hugh Jackman and wife Deborra-Lee Jackman attend the "Change Begins Within" on Tuesday, Nov. 3, 2013 in New York. (Photo by Donald Traill/Invision/AP)
Actor Hugh Jackman, left, and his wife, actress Deborra-Lee Furness, right, attend the New Yorkers For Children Fall Gala 2013 on Tuesday, Sept. 17, 2013 in New York. (Photo by Andy Kropa/Invision/AP)
Honoree Hugh Jackman and wife Deborra-Lee Furness attend the Museum of the Moving Image Salute to Hugh Jackman at Cipriani Wall Street on Tuesday Dec. 11, 2012 in New York. (Photo by Evan Agostini/Invision/AP)
Actor Hugh Jackman and wife Deborra-Lee Furness arrive at the 66th Annual Tony Awards on Sunday June 10, 2012, in New York. (Photo by Evan Agostini/Invision/AP)
Hugh Jackman and wife Deborah-Lee Furness are seen walking in New York, Tuesday October 13, 2009. (AP Photo/Donald Traill)
Hugh Jackman, right, and his wife Deborra-Lee Furness arrive at the Help Haiti benefit honoring Sean Penn hosted by the Stiller Foundation and The J/P Haitian Relief Organization, in New York, Friday, Feb. 11, 2011. (AP Photo/Charles Sykes)
Hugh Jackman, poses with his daughter, Eva, 3, and his wife, Deborra Lee Furness before a ceremony placing his hand and footprints in cement outside Grauman's Mann Chinese Theater Tuesday, April 21, 2009 in Los Angeles. (AP Photo/Nick Ut)
Photo by: Lee Roth STAR MAX, Inc. - copyright 2003 ALL RIGHTS RESERVED Telephone/Fax: (212) 995-1196 4/28/03 Hugh Jackman and wife Deborra Lee Furness at the premiere of "X-2: X-Men United". (Hollywood, CA) (Star Max via AP Images)
Actor Hugh Jackman, who stars in the film "X-Men," arrives with his wife Deborah at the New York premier of the film "Coyote Ugly" Monday, July 31, 2000. (AP Photo/Mitch Jacobson)
Australian actor Hugh Jackman arrives with his wife, Deborra-Lee Furness at the 74th annual Academy Awards on Sunday, March 24, 2002, in Los Angeles. (AP Photo/Laura Rauch)
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The Wolverine star also went into how he met Furness, 60. "That was my first job, where I met her. She was the star I had this major crush on her. Everyone did," Jackman explained. "The whole crew had a crush on her and I was so embarrassed that I didn't talk to her for about a week."
A week later, he says he got the courage to ask Furness to a dinner party. "I invited her over and about 20 other people, and she said, 'What's the matter, have I annoyed you? You're not talking to me anymore. What have I done wrong?'" he recalled. "I'd had a couple and I said 'Look I got a crush on you, I'll get over it,'" he said. "And she went, 'Oh really.' And I was like, 'Oh, this is bad.' And she goes, 'Yeah, I got one on you too.' ...That was it."
When ET chatted with Jackman in September, he revealed that his anniversary plans are inspired by the movie Begin Again. "Remember the splitter moment...Keira Knightley and Mark Ruffalo with headphones with a splitter so you could both be listening to the same song and walking around?" Jackman said of the 2013 film. "I was like, I'm knicking that idea. Thanks Mark!"