It happened while he was preparing for a TV interview.
A smoothie has been thrown at the Tánaiste in Dublin.
In the clip, a woman is seen approaching Leo Varadkar as he is preparing to do a piece to camera in a park.
She is then seen running from the area on a video shared on social media.
Jesus, this is a poxy thing to do, regardless of your political view. pic.twitter.com/f3cRpJ3xPV
— Noel Rock (@NoelRock) September 18, 2020
Young Fine Gael has labelled the incident 'disgusting'.