He played the title role in the film Igby Goes Down, for which he was nominated for a Golden Globe Award; and previously appeared in the Academy Award-nominated movie Music of the Heart.
In addition to that, you also probably think of her past relationship with Andrew Garfield.
The pair enjoyed a romantic stroll along the Champs-Elysées, with the actress wrapping her arm around Kieran affectionately.
The pair are thought to have also made a visit to the Crazy Horse, Paris' famous strip club.
There's also a good chance he's the only person you know the Golden Globe winner has dated.
In 2015, he portrayed Rye Gerhardt in the second season of the critically acclaimed FX series Fargo. He has four brothers: Shane (born 1976), Macaulay (born 1980), Christian (born 1987), and Rory (born 1989), and sister Quinn (born 1984).
His second sister, Dakota (born 1979), died in a car accident in 2008.
The friend revealed: "[Johansson and Timberlake] hooked up several times over the years.
They've always been fine keeping it just sex and friendship." Johansson, who split from actor Sean Penn earlier this year, finalised her divorce from Green Lantern star Ryan Reynolds in July.