A better way to get AD details from User.Identity.Name

I have an ASP.NET MVC app that uses Windows Integrated Authentication (an intranet app). This works great, and the user get's SSO into the application.
Currently, so I can get extra user information (user displayname, Guid, email etc) I am doing the following in my controllers:
private UserPrincipal currentUser = null; private UserPrincipal CurrentUser { get { if(currentUser == null) { using (var context = new PrincipalContext(ContextType.Domain)) { currentUser = UserPrincipal.FindByIdentity(context, User.Identity.Name); } } return currentUser; } } Is there a better way?
Thanks for any advice,
Richard