The star surprises actors in a play when he turns up at the historical attraction
Depp took his children Lily Rose and Jack to Hampton Court on Easter Monday for a fun family day out.
However, as the star stopped to watch one of the many plays being performed, one of the male actors in it was so shocked to see Depp in the audience, he forgot his lines.
The 'Tourist' star had not alerted the Hampton Court staff he would be visiting, so nobody was prepared to have a celebrity in their midst.
'It’s not every day that a Hollywood superstar comes to watch you act' said a source 'One of the guys performing was so stunned when he caught a glimpse of Johnny that he forgot what he was doing'.
Depp is currently in the UK to put the final touches to his latest film, Tim Burton's 'Dark Shadows'.