Actor Mark Hamill has lent his voice as a Jedi from “Star Wars” to a new air-raid app being used in Ukraine to warn residents of an incoming aerial bombardment from Russia.

The 71-year-old actor—best known for his role as Luke Skywalker in George Lucas’ hit franchise—urges people to seek shelter in his familiar voice as a Jedi knight, the Associated Press reported.

“Attention. Air raid alert,” Hamill tells people when the downloadable app linked to Ukraine’s air defense system goes off. “Proceed to the nearest shelter.”

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“Don’t be careless,” Hamill’s voice advises. “Your overconfidence is your weakness.”

And when it is safe for residents to come out from their shelter, the famed “Star Wars” star announces in his Jedi voice “the air alert is over. May the Force be with you.”

Read more: Daily Wire