You will usually need a relevant degree that teaches both design and technical skills and will give you the practical knowledge needed to work in the industry.
To search for colleges and universities offering fashion and textile-related courses and degrees, use the course search on this site and check with individual colleges and universities as entry requirements vary.
You will need to put together a portfolio of work experience that you can take along to interviews.
As the industry is very competitive (more than 3,000 fashion and textiles students qualify from higher education each year), any work experience you gain will give you an advantage when it comes to getting a job.
See the Can U Cut It website for advice on finding work experience and more information about careers in the fashion industry.