"Ashton and Mila have talked about getting engaged and married for quite awhile," a business source close to Kutcher tells PEOPLE. "He wants to get engaged during the holidays."
The last barrier to a proposal finally crumbled this week when the court signed off on Kutcher's divorce from Demi Moore, two years after the pair announced their separation following six years of marriage.
"Ashton's been waiting for his divorce to be over for a long time," another source in the Two and a Half Men star's inner circle says. "He was annoyed it took so long. It was hanging over his head."
Here's a look back at the long road of Kutcher and Kunis's relationship, from separation amid infidelity reports, to jet-setting romance, to the filing of legal papers.
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December 2011: Kutcher filed for divorce, citing irreconcilable differences and not seeking any spousal support or asking the court to deny Moore any. The documents also showed that because the couple had no children together, child support and visitation were not an issue.
April 2012 Kutcher and Kunis were first seen out and about together, having dinner with fellow That 70s Show cast members Wilmer Valderrama and Larua Prepon. At the time, a source told the PEOPLE the two were nothing more than friends – which Kunis's rep confirmed.
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August 2012: By now Kutcher and Kunis had taken their budding relationship overseas. They were spotted in Bali, sources told PEOPLE. They spent some one-on-one time at a five-star resort on the island's southern peninsula, according to the New York Post.
September 2012: Back in the States, they were spotted smooching in New York's Central Park. "They held hands and were very affectionate," an onlooker tells PEOPLE. "They looked very relaxed and seemed very happy together."
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"Demi felt like she had been wronged," a family source said at the time. "She's the one who was forced to end it. She's making a point."
April 2013: The ongoing divorce litigation did nothing to cool things between Kutcher and Kunis. They toured Bruges, Belgium, on in a horse-drawn carriage to take in the cobblestone streets and ancient bridges. They also explored the city on foot, stopping into the local market and famous chocolate shops just before enjoying a meal at the triple-Michelin starred Carmelite restaurant.
May 2013: Kutcher and Kunis vacationed in Jerez De La Frontera, Spain. In town for the MotoGP races, they also took in the sights, including a local winery.
The same month they traveled to London and toured a string of bars with Princess Beatrice and her boyfriend, Dave Clark, then were photographed in the city while also hooking up with Kunis's parents.
June 2013: More double-dating, as Kutcher and Kunis enjoyed fun in the sun with Beatrice and Clark in Saint-Tropez, France. The friends were spotted along Pampelonne Beach, aboard a yacht and visiting the Le Palmiers beach.
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Later in September, there was a sign of a thaw in the divorce dispute. Kutcher and Moore were seen walking together through a Burbank airport after exiting the same flight. They had been attending a tech conference, E! reported, related to their organization Thorn, which works to defend children against online predators.
October 2013: Kutcher and Moore were now close to finalizing their divorce. A source confirmed to PEOPLE that the divorce agreement had been drawn up merely awaiting the signatures of the couple.
November 2013: Two years after splitting, the Kutcher-Moore divorce was finalized. "Judgment of dissolution is entered," reads a box marked on the papers. "The parties are restored to the status of single persons."