Mbappé, who returned to training among the last of Real Madrid's stars following the World Cup, spoke to the club's in-house media about his new manager for the first time.
"I think it's very positive to have a coach like Mourinho, who knows how to win, who knows how to give direction on how to do it," the French forward said. "Every player is delighted to have a coach who knows where he's going, and it's very positive for us."
Real Madrid open their La Liga campaign away at Espanyol on August 22, and Mbappé, last season's World Cup top scorer with ten goals despite France's fourth-place finish, made clear where his focus lies.
"It's time to go all out and get the feelings right to be ready for the first game," he said, repeating the word "win" throughout the interview. "I'm sure we're going to win titles again, that's what we want and it's going to happen.
"I feel the team has the hunger. We're going to stay focused all year to bring joy to Madridistas."
The France captain also reflected on his enjoyment of representing the club two years into his spell at the Bernabéu.
"For me it was a dream to come here, to be here every day," he said. "I'm someone who knows how to enjoy the present and I know how lucky I am. But now we have to win — you can be at Real Madrid or anywhere else, but here you have to win titles, win things, and that's why I'm here. We're going to win titles this year."
He closed with a message to supporters: "Thank you for all the support you've given us during the two years I've been here. I know this year is going to be more important and that we're going to do great things together."
Away from the first team, Real Madrid's academy continues to produce replacements as quickly as it sells its brightest talents. Manex Rezola, an Antiguoko and Logroñés product signed for around €150,000 in January, has impressed since stepping up to Castilla under Julián López de Lerma, continuing that form into this pre-season.
The 19-year-old, a classic number 10 who models his game partly on Luka Modrić despite a more attacking profile, is expected to take on a bigger role this season with several senior figures having left the reserve side, potentially featuring as an interior midfielder or in a deeper role given Pol Fortuny's status as the first-choice attacking midfielder.
Rezola has already trained with Mourinho's first team on several occasions during pre-season, part of a wider pattern of the Portuguese coach involving academy players regularly in senior sessions.
A path to the very top remains difficult given the presence of Jude Bellingham and Arda Güler in his position, but Real Madrid's recent history of academy graduates breaking through amid a congested fixture list means the door is not considered closed.