They do lip sync sometimes, but not always, and it's not always to "no music."
* For prerecorded music: Yes, actors often lip sync to prerecorded music during filming. This is common for:
* Music-heavy scenes: Concerts, dance scenes, or scenes where the music is a central element.
* Budgetary reasons: Hiring a live band or orchestra can be expensive, and it's easier to record the music separately and have the actors lip sync.
* For original music: Sometimes, actors might lip sync to a track that will be written and recorded *after* filming. This helps them get a sense of the rhythm and timing of the song, even if it's not the final version.
* For no music at all: This is less common, but it can happen in scenes where the character is singing or humming to themselves, and the music is not a focal point. In these cases, the actors might just move their lips without actually singing.
There are also times when actors don't lip sync at all:
* Live performances: If a scene involves a real-life musical performance, the actors will sing live.
* Strong singing abilities: Some actors are skilled singers and are comfortable performing live on set.
It's worth noting:
* The "lip-syncing" can be subtle. Actors might not be perfectly in sync with the music, or they might use a combination of live singing and lip-syncing.
* The decision to lip sync is often made based on a number of factors, including budget, technical feasibility, and artistic choices.
So, while actors do sometimes lip sync during filming, it's not a universal practice and depends on the specific scene and production.