The couple were spotted having dinner at the restaurant Checchino Dal 1887 on Friday (November 23) night, according to Pop Sugar.
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Kunis is currently in Rome shooting The Third Person, a thriller also starring Kim Basinger, Olivia Wilde, Liam Neeson and James Franco.
Neither Kutcher nor Kunis has publicly acknowledged their relationship, though the two have been seen together on many occasions since Kutcher's split with ex-wife Demi Moore.
Both actors starred together in the hit sitcom That '70s Show, and remained close friends after the series wrapped.
When asked earlier this year if she and Kutcher were dating, Kunis insisted that there was no romantic involvement between the two.
