Here's what we know:
* They were all very young during filming: The pressure of filming a huge franchise like Harry Potter, alongside intense media attention, could have caused some tension.
* They have different personalities: Daniel Radcliffe is known for being introverted, while Rupert Grint and Emma Watson are more outgoing. These differences could have led to occasional disagreements.
* They've been open about their challenges: All three actors have spoken about the challenges of growing up on set and the difficulties of managing their fame.
* They remain friends: Despite any difficulties, they have consistently maintained that they are friends and respect each other.
It's important to note that rumors and speculation about celebrity relationships are often fueled by media attention and speculation. While some tension may have existed, it's likely that it was managed professionally and that the three actors remained close friends throughout the filming of the Harry Potter franchise.