The 17-year-old son of David and Victoria Beckham is set to get the huge sum for appearing in a commercial for Chinese mobile phone company Huawei, which he filmed earlier this week.
A source told The Sun: "Huawei went for Brooklyn because he's young, well-presented and seen as a good role model for kids his age.
"He's got millions of social media followers and this is a good way to engage a load of youngsters.
"People will think he's only got this job because of his rich parents bur he doesn't take anything for granted."
Meanwhile, the photographer has recently returned from the US following a visit to see his girlfriend Chloe Grace Moretz in Los Angeles and the pair are completely smitten with each other.
Chloe, 19, recently revealed Brooklyn makes her feel beautiful, saying: "My boyfriend is a huge support. I mean, don't get me wrong, I don't need a man for anything, but when I'm feeling bad about myself, he's like, 'Stop. Look at what you say in interviews. Look at what you stand for. Listen to your own words, because you're as beautiful as you say you are!
"[He believes] women are more beautiful than they think. It's nice to have a young man who's 17 years old be able to look at a woman that way. I think it means we're on the right track."
Chloe - who was first romantically linked to Brooklyn at Paris Fashion Week in 2014 - previously insisted she doesn't see any point in hiding their relationship any longer.
Quizzed on whether she is dating Brooklyn, she said: "I think the more I don't make it mysterious the more people don't care, so yes we're in a relationship."
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