YOU SHALL NOT PASS! Ian McKellen channels Gandalf to warn Oxford students to study

Sir Ian McKellen channeled his character Gandalf from "The Lord of the Rings" and "The Hobbit" series to motivate a group of Oxford students on Monday. (Joel Ryan / Invision / AP)

Sir Ian McKellen is one of the most celebrated actors in stage and cinema, known for his work in "The Lord of the Rings," "The Hobbit," and "X-Men" series. McKellen was speaking at Oxford University on Monday when he left the following piece of advice to a group of eager students.

"You shall not pass!" is a well-known quote from McKellen's character Gandalf in "The Lord of the Rings: The Fellowship of the Ring" as he is battling a Balrog in the Mines of Moria. This isn't the first instance where McKellen has channeled Gandalf to inspire students. While visiting Chew Valley School in the United Kingdom on October 17, McKellen provided the same powerful message to the delight of schoolchildren seen in the video below.

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YOU SHALL NOT PASS! Ian McKellen channels Gandalf to warn students