Dropped out from University of Iowa to pursue modeling. His major was biochemical engineering.
Used to have a job sweeping the floor at a General Mills plant.
Won the Fresh Faces of Iowa modeling contest in 1997, sparking a modeling career in New York City.
Has a fraternal twin brother, Michael, and an older sister, Tausha Kutcher.
He auditioned for a role at NBC and knew he didn't land it. As he was leaving, an executive asked him to read for a new NBC pilot called Wind on Water (1998). "I went and did a cold reading of the character and found out I had gotten the job but told them I had to read the script first and after reading it, decided I did not want to be a cowboy surfer. My agent had told me about a series called "Teenage Wasteland" (later renamed That '70s Show (1998)) and I went in to read and told them I had to know if I had gotten the role by 3:45 that afternoon. I was supposed to tell NBC if I wanted the role on Wind on Water (1998) by 4:00 p.m. Luckily, I got the role on this show.". Wind on Water (1998) was canceled after two episodes.
Was once so poor, he donated his blood for money while attending the University of Iowa.
Lost the role of Danny Walker in Pearl Harbor (2001) to Josh Hartnett.
One of Teen People Magazine's 25 Hottest Stars Under 25. 
His twin brother Michael was born with a septal heart defect.
On January 23, 2004, he went head to head with his That '70s Show (1998) co-star Topher Grace at the box office as The Butterfly Effect (2004) starring Kutcher and Win a Date with Tad Hamilton! (2004) both opened against one another. The Butterfly Effect (2004) won the race coming in at the #1 spot, while Win a Date with Tad Hamilton! (2004) came in at #3 just after Along Came Polly (2004).
Older sister Tausha Kutcher has a daughter, Dakota (born 1999).
Voted #3 on VH1's 100 Hottest Hotties.
Is a member of the Delta Chi Fraternity, along with Kevin Costner, Sascha Turnheim and Alan Heitz.
Has two toes on his left foot that are fused together, meaning they are webbed.
Ranked #35 on Premiere Magazine's 50 Most Disturbing Moments in Movie History. Kutcher's face is just placed there, instead of an explanation as to why.
Owns a restaurant in Los Angeles, California called Dolce.
Ranked #17 in TV Guide's list of "TV's 25 Greatest Teen Idols" (January 23, 2005 issue).
Lost the lead role of Drew Baylor in Elizabethtown (2005) to Orlando Bloom when Cameron Crowe decided he wanted an actor that had a solid résumé consisting of Theatre and Drama school training.
Was the first of the six primary cast members of That '70s Show (1998) to receive a Razzie Award nomination. He was nominated for Worst Actor of 2004 for his roles in the films Cheaper by the Dozen (2003), Just Married (2003) and My Boss's Daughter (2003). However, he did not win.
Along with Topher Grace, he chose not to renew his contract to do an 8th season of That '70s Show (1998), wishing to pursue other projects.
Created the MTV reality television show Punk'd (2003) with his friend Jason Goldberg.
Ashton's father is of Bohemian (Czech) ancestry. Ashton's maternal grandfather was the son of Irish immigrants, while Ashton's maternal grandmother had Bohemian (Czech) and German ancestry.
Former boyfriend of Brittany Murphy and January Jones.
His wedding with actress Demi Moore was attended by about 100 guests, among them were Moore's ex-husband Bruce Willis, their three daughters, and Lucy Liu.
Best friends with Wilmer Valderrama.
Former stepfather of Rumer Willis, Scout Willis and Tallulah Willis.
Marriage to Moore was his first, her third.
His parents are Larry Kutcher (an employee of General Mills) and Diane (who worked for Procter & Gamble).
While as a guest on The View (1997), he explained he quit smoking cigarettes for his role in The Guardian (2006) by reading the book, "The Easy Way to Stop Smoking" by Allen Carr.
(September 29, 2006) Has the rare distinction of being in two movies that opened on the same day in the United States - Open Season (2006) and The Guardian (2006).
Was considered for the role of Batman in Batman Begins (2005), which eventually went to Christian Bale.
Attended the University of Iowa, as did Gene Wilder, Ben Rollins and Mary Beth Hurt.
Wrestled in high school. He injured himself and had to quit in his senior year.
Close friends with Smallville (2001) star Tom Welling, whom he met when they were both modeling.
His three former stepdaughters called him MOD ("My Other Dad").
In February 2010, he joined the State Department and top executives from eBay and Twitter on a biz trip to Moscow and Siberia trying to help Russia start up their own Silicon Valley (Time magazine).
Beat to reach 1-million Twitter followers. He now has millions more. 
Named one of Time Magazine's Top 100 Most Influential People. 
In 2010, Kutcher and his ex-wife, Demi Moore, created "The Demi and Ashton Foundation" (DNA) to eliminate child sex slavery worldwide.
Traveled to Russia as part of President Obama's first U.S.-Russia Innovation Delegation. The purpose was to generate ideas in support of the U.S.-Russia Bilateral Presidential Commission and address anti-trafficking and child protection issues. [February 2010]
Katalyst was named one of the year's Top 50 Most Inspiring Innovators by Ad Age and one of Fast Company Magazine's Top 10 Most Innovative Companies. 
Merited a place in Time magazine's - The 100 Most Influential People in the World ("Artists" category) - with a tribute provided by Sean 'Diddy' Combs. [May 2010]
Was Riley Smith's roommate in 1997 in New York City at the IMTA convention after knowing each other in Cedar Rapids, Iowa, their hometown. Josh Duhamel also attended that year.
Kutcher's debut as Charlie Sheen's replacement in CBS's Two and a Half Men (2003) was seen by 28.7 million people on September 19, 2011. The Nielsen Company reported that was more than any other episode in the series' first 8 seasons, when Sheen was the star. On the very same night, Charlie Sheen was roasted on a Comedy Central special.
Is a huge fan of the Chicago Bears, and can be seen wearing various items of Bears clothing in his films.
Is a liberal Democrat and has supported the presidencies of Bill Clinton and Barack Obama.
In 1998, he was slowly in the works to make his acting debut in the lead role for a situation comedy entitled "A Tale of Two Strippers"; which told the story of two male exotic dancers in Las Vegas who find themselves trying to evade a hit man after witnessing an arranged murder when they get an address mixed up and arrive to the wrong location to perform a private gig. The project was written and was to be directed by Alan J. Pakula but he died in an automobile accident before anything could start so the project was immediately canceled. Had it gone through, it would have also marked the screen debut of actor Josh Duhamel, who was going to play the second male lead.
Promoted and attended the premiere of the romantic comedy Killers (2010) in Sydney and Melbourne, Australia. [July 2010]
Has been in a relationship with Mila Kunis since April 2012 and they have been engaged since February 2014; they have a daughter together.
Became a father for the 1st time at age 36 when his fiancée (now 2nd wife) Mila Kunis gave birth to their daughter Wyatt Isabelle Kutcher on October 1, 2014.
(July 4, 2015) Married his girlfriend of 3 years Mila Kunis in The Secret Garden at Parrish Ranch in Oak Glen, San Bernardino County, California following a 17-month-long engagement.
Became a father for the 2nd time at age 38 when his 2nd wife Mila Kunis gave birth to their son Dimitri Portwood Kutcher on November 30, 2016.
Reported in the new issue of Life & Style Magazine he and wife Mila Kunis are expecting a boy.
The average birth weight of Ashton and wife Mila Kunis's children is 4.182192 kilos or 9 lbs 3.5 oz Daughter Wyatt weighed 9 1/2 lbs at birth and son Dimitri weighed 8 lbs 15 oz at birth.
Friends with Sean 'Diddy' Combs.
Met his wife Mila Kunis on That '70s Show.
Has Irish, Czech, and German ancestry.
Often wears the same beaded necklace in pictures, interviews, etc.