Bana Alabed shared a short video of herself and the Mean Girls star.
They were in Ankara, Turkey, where they met President Recep Tayyip Erdogan.
Ms Lohan, who has been in the country for the past few days, says in the video that the pair are "sending lots of love and life and blessings" to refugees and people in Syria.
The short clip shows Bana hugging the actress, who tells the camera: "We want to send to all of the people in Syria and Aleppo suffering and to all the refugees we are here supporting you and you can hang on and be strong just like Bana has."
