"And I have a very good feeling with Borussia Dortmund".
"Even though Julian has played in Bundesliga for such a long time and has a lot of experience both on an worldwide and national level, at 23, he is still a young pro with a lot of potential to develop further", Dortmund sporting director Michael Zorc said.
The younger Hazard, 26, announced in April that he would join the Bundesliga runners-up this summer, once both parties had agreed terms.
Hazard, a Belgium midfielder who had a year to run on his contract at Borussia Moenchengladbach, scored 13 goals in 35 games last season.
"He is an experienced Bundesliga professional and Belgian national player who will help us with his speed and the quality of his finishing".
Hazard impressed in the Bundesliga for Monchengladbach during the 2018/19 season, scoring 10 and assisting 10 from the right side of midfield, attracting interest from a host of top clubs.
I have high hopes with the lads, I'm very motivated and optimistic - not just when it comes to my development as an individual, but the development of the entire team too.
Explaining his decision to join BVB, he said: "I am a person who sometimes decides things from the gut, and for whom a good feeling is important". So the fact that Borussia Dortmund were able to get their man for 25.5 million euros makes the deal even sweeter, especially in today's market.
Brandt, a 23-time Germany worldwide, has been linked with several clubs across the continent, including some of the "Big Six" in the Premier League, but Die Borussen have fended off competition to land the forward.