Either is fine. As an American, I would probably shorten it to: When is the movie ? What time is the movie?

Hi Zoe! Both are commonly used.

There’s nothing wrong with the sentence, but I think that Brits would more likely use start than begin and we usually use the words film instead of movie

The first is asking for a specific time. Answer: 3:00 pm The second could be a specific time or an approximation. Answer: 3:00 pm, or 15 minutes, or soon.

they are both commonly said.