British Astronaut Tim Peake tried to make a Christmas phone call to home from the International Space Station. But he dialed a random woman by mistake.

Peake took to Twitter to apologize to the unnamed woman, assuring her it was not a prank call.

Since the 43-year-old is Britain’s first publicly funded astronaut and the first Briton to visit the space station, millions of Britons have been following his mission closely.

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