Which actor is listed as starring in Na Hong-jin's film 'Hope', which premiered in the Main Competition at the 2026 Cannes Film Festival, according to the official festival program and at least two major entertainment news outlets?

Sufficient redundancy for fair resolution (5+ sources).

80% of sources must agree - strong agreement threshold.

The prompt is precise and unambiguous.

Sources appropriately encode the relevant time window.

Sources are highly relevant and authoritative.