Johnny Depp took a speedboat to his Hollywood Vampires concert in Sweden on Monday amid reports of increased security for the star.
The actor and musician, who is touring Europe with the group amid ex-wife Amber Heard's claims he physically assaulted her, is said to have been accompanied by eight security guards before checking into a $12,000 (£8,000) per night hotel.
A source told a website: "He is always keeping to himself. Ordering room service and never spends time with the band."
It's said the star, who lost his mother three days before his partner demanded a restraining order and filed for divorce, is under a lot of stress amid Heard's claims, which he denies.
An anonymous crew member said: "We have all been told not to talk about Johnny for obvious reasons. He is under a lot of stress at the moment and talk about him might affect the band."