Brie Larson, Samuel L. Jackson Lie To Each Other In 'Carpool Karaoke'

The "Captain Marvel" stars took a polygraph test that revealed some embarrassing truths.

Truth be told, Brie Larson and Samuel L. Jackson are bad liars.

In James Corden’s preview Tuesday of “Carpool Karaoke: The Series,” the “Captain Marvel” co-stars sing some Ariana Grande before a polygraph expert joins them to liven up the commute.

They asked each other questions about singing talent, fashion and Jackson’s farting.

Honesty was not always their best policy.

Watch the preview below. The full episode airs on Friday.