Don't expect to see Arnold Schwarzenegger on a therapist's couch any time soon.
The 67-year-old action star appeared on Howard Stern's Sirus XM show on Wednesday, when he got candid about his 2011 split with Maria Shriver after 25 years of marriage. The two divorced after it was revealed he fathered a son more than 14 years earlier with an employee in their household, Mildred Baena.
"This was without a doubt the biggest setback and the biggest failure [in my life]," Schwarzenegger said about the demise of their marriage. "Not only failure, but you really feel like, 'I'm to blame for it. It was me that screwed up,' and you can't point the finger at anyone else."
Schwarzenegger said the two tried couples therapy to mend their relationship, but called it "the biggest mistake" he's ever made.
PHOTOS: Arnold through the years
Arnold Schwarzenegger through the years
Arnold Schwarzenegger calls couples therapy with Maria Shriver the 'biggest mistake' he's ever made
"My body. *My* choice!"
As a kid himself!
LOS ANGELES, CA - SEPTEMBER 08: Actor and former California Governor Arnold Schwarzenegger and his daughter Katherine attend Trust Your Senses At DVF for Fashion's Night Out on September 8, 2011 in Los Angeles, California. (Photo by Amanda Edwards/Getty Images for DVF)
NEW ORLEANS - FEBRUARY 16: (LtoR) California governor Arnold Schwarzenegger with son Patrick Schwarzenegger, Maria Shriver and Christopher Schwarzenegger watch during NBA All-Star Saturday Night part of 2008 NBA All-Star Weekend at the New Orleans Arena on February 16, 2008 in New Orleans, Louisiana. (Photo by Bryan Bedder/Getty Images)
UNITED STATES - NOVEMBER 16: Arnold Schwarzenegger and wife Maria Shriver are on hand at the Plaza Hotel where he was honored with a Global Youth Peace & Tolerance Award. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
E366553 3/26/00 Los Angeles, Ca. Arnold Schwarzenegger And Wife Maria Shriver At The 72Nd Annual Academy Awards. Dave Mcnewonline Usa Inc. (Photo By David Mcnew/Getty Images)
368141 12: ***ESCLUSIVE*** Arnold Schwarzenegger plays in the hotel swimming pool with one of his daughters during an Easter vacation April 21, 2000 in Maui, Hawaii. (Photo by Chris Morton/Online USA)
BEIJING - MAY 19: (NO U.S. TABLOID SALES) Actor Arnold Schwarzenegger and his wife, television journalist Maria Shriver, visit the Forbidden City during a Special Olympics Event May 19, 2000 in Beijing, China. (Photo by David Hume Kennerly/Getty Images)
Arnold Schwarzenegger & Family during Hollywood Celebrity Families turn out to Celebrate Old Navy and P.S. Arts Partnership at Old Navy Store in Santa Monica, California, United States. (Photo by SGranitz/WireImage)
399207 01: Actor Arnold Schwarzenegger and his son, Patrick, pose in front of an F-22 Raptor with airmen in this undated recent photo at Edwards Air Force Base in California. In a recent poll, military members voted Schwarzenegger the star they would most like to meet. (Photo by Stacee McCausland/USAF/Getty Images)
SACRAMENTO, CALIFORNIA - NOVEMBER 17: California Governor-elect Arnold Schwarzenegger walks with his wife Maria Shriver and their four children to his inaugural ceremony at the State Capitol in Sacramento on Novemeber 17, 2003 in Sacramento, California. (Photo by Lucy Nicholson-Pool/Getty Images)
UNITED STATES - MAY 01: Eunice Shriver with daughter Maria, Arnold Schwarzenegger and some of her grandchildren attending the National Center on Poverty Law's Tribute to Sargent Shriver at the Beverly Hilton Hotel in Beverly Hills, CA 05/01/03 (Photo by Vinnie Zuffante/Getty Images)
BEVERLY HILLS, UNITED STATES: Actor Arnold Schwarzenegger(2nd from R) and his wife Maria Shriver(R) arrive at the premiere of the Steven Spielberg movie 'Amistad' with family members Bobby Shriver(L), Timothy Shriver(2nd from L) and his wife(C) 08 December in Beverly Hills. The film about a slave ship revolt stars Morgan Freeman and Anthony Hopkins. AFP PHOTO Vince BUCCI/mn (Photo credit should read Vince Bucci/AFP/Getty Images)
"Money doesn't make you happy. I now have $50 million but I was just as happy when I had $48 million."
"My body is like breakfast, lunch, and dinner. I don't think about it, I just have it."
"The mind is the limit. As long as the mind can envision the fact that you can do something, you can do it, as long as you really believe 100 percent."
"Milk is for babies. When you grow up you have to drink beer."
"I have to give the audiences what they enjoy seeing while I try to bring in a little something new"
"Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to surrender, that is strength."
"You know, nothing is more important than education, because nowhere are our stakes higher; our future depends on the quality of education of our children today."
"People should make up their own mind about what they think of me."
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"Because the guy was so full of sh*t," he said bluntly. "He said more crap and more nonsense. It was absolutely totally counterproductive to our future relationship, or to any hope to get together or anything like that. It was just nonsense talk."
"Maria talked me into it, and I knew instinctively maybe I shouldn't go because I screwed up," he further explained. "I don't have to go through anyone to have him explain to me anything. You know, I apologized to Maria, I apologized to the kids, and I tried to move forward and make the best of it ... It has worked out really so well with the help of Maria, with the help of the kids, but not because of the shrink or some psychiatrist."
Schwarzenegger stressed that he still has a great relationship with his four children with Maria -- 25-year-old Katherine, 23-year-old Christina, 21-year-old Patrick, and 17-year-old Christopher.
"My kids are a straight 10," he gushed. "I am so proud of them and I'm so in love with them. I love my kids so much."
Schwarzenegger, who still referred to Maria as his "wife" in the interview, shared a particularly heartwarming story of his ex and their kids recently surprising him with balloons and sweet notes at the premiere of Terminator Genisys in Berlin.
"There was a note -- 'You're the greatest dad, you're the greatest this. We love you daddy' -- all this kind of stuff. It really made me feel so good, each one sent a card. Each one sent a little gift, so that's the relationship I was looking forward to have after this complicated bump and this screw-up."
The former governor of California also called his son with Baena, Joseph, "terrific."
"He totally understands the situation and all that, so it has all worked out so well," he shared. "It's a very tough situation for him, it's a very tough situation for my kids ... but it has happened, and now we have to kind of try and figure it out, right?"