Bana Alabed shared a short video of herself and the 30-year-old "Mean Girls" star. They were in Ankara, Turkey, where they met President Recep Tayyip Erdogan.
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, reported BBC.
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."
Bana rose to fame after documenting on Twitter her daily life in rebel-held East Aleppo, with the help of her mother.
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The seven-year-old recently penned an open letter to new US President Donald Trump, asking him to open the country to refugees.
Rumours began circulating this week that Lohan may have converted to Islam, after she was spotted in Turkey wearing a hijab.
The actress has also deleted all of her posts on Twitter and Instagram, changing her bio on the latter to read "alaikum salam", which means "peace be upon you" in Arabic.