Angelina Jolie and Brad Pitt have sex in several secret places.

The Hollywood couple, who raise six children together, keep the spark alive in their relationship by sneaking off to make love in their favourite 'special' spots.

Referring to Brad's recent claims the pair have sex in a grotto behind a waterfall in his pool, Angelina said: "Yeah, well, we've got a few special places. You keep it going."

Brad laughingly added: "It's not true. We have far more comfortable places to go. There is an old Hollywood property just a few minutes away. It has a grotto there. The rumour is Jimi Hendrix spent some time there. That's the story. I run with it."

Angelina also admitted she was thrilled when Brad recently described her as his "soulmate".

The 34-year-old screen beauty said: "That is very cool. Well, he's mine. It is what it is."

The couple appeared together on the red carpet of the Los Angeles premiere of Brad's new film 'Inglourious Basterds', and Brad took the opportunity to dismiss speculation their relationship has hit a Rocky patch.

The 45-year-old actor - whose ex-wife is Jennifer Aniston - said: "We've both been around long enough and have been in enough relationships to know what we want out of it, and to know when we're wasting time."

Angelina - who was previously married to actors Jonny Lee Miller and Billy Bob Thornton - insisted she is so happy with Brad they are planning to expand their already large family again.

She said: "We will always want more children. I would love to, but we have a lot of kids to raise!"