Dicaprio and his guest will be passengers on one of those swanky Virgin Galactic flights.
A seat normally costs $200,000, and there's already a waiting list of 529 passengers -- one of them being "Two and a Half Men" star Ashton Kutcher.
The first flight is expected to launch around Christmas, but there's no word who won the seat.
Amanda Bynes was arrested Thursday night after she threw a bong out the window of her 36th-floor New York City apartment.
Police were called after Amanda was seen smoking pot in the lobby of her building.
Police arrested her for possession of marijuana, tampering with evidence and reckless endangerment, and took her to a hospital for psychiatric evaluation.
She's expected to appear in court Friday morning.
According to Radar Online, Lindsay Lohan tried to invite her drug dealer to visit her at Betty Ford.
A source says Lindsay asked the clinic for permission to invite him, but they turned her down.
"Lindsay treatment team told her in no uncertain terms that she needs to sever her relationship with him once she leaves rehab, if she is to overcome her addictions," said the source.