The two Oscar winners team up for the new disaster movie and even though "The Hunger Games" star gets top billing, DiCaprio scored a bigger payday, landing $5 million (£3.7 million) more.
Lawrence is a fervent supporter of pay equality in Hollywood, but accepts her castmate's salary hike is just business.
When the matter was raised during a recent Vanity Fair interview, Lawrence said, "It's extremely uncomfortable to inquire about equal pay... Look, Leo brings in more box office than I do. I'm extremely fortunate and happy with my deal, but in other situations, what I have seen - and I'm sure other women in the workforce have seen as well - is that it's extremely uncomfortable to inquire about equal pay."
But she did get her way about the billing for the film, adding, "I was number one on the call sheet... and I thought (the credits) should reflect that. Leo was very gracious about it."
"I think we had something called a Laverne & Shirley, which is this billing they invented where it's an equal billing. But I guess maybe somewhere down the line, I kicked the stone further, like, 'What if it wasn't equal?' "
In the new movie, Lawrence and DiCaprio play astronomers trying to warn people about a comet on a collision course with earth. The film, set for release in theaters and on Netflix on December 24, also features Meryl Streep, Jonah Hill, Timothee Chalamet, Tyler Perry and Ariana Grande.