He told the Confidenti@l column in the New York Daily News newspaper: ''I hate to tell you this, but Kendall will be doing the heartbreaking.
''I'm sure she's having a fun time with him. She has a very level head, great head on her shoulders. But they are both so young.''
The 19-year-old singer is only a year older than Kendall, and Brody certainly seems to approve of their romance.
He said: ''It sounds like a match made in heaven. That's what it sounds like, but I've never met him ... My dad told me that Harry Styles plays golf, so that's cool.''
With mounting speculation Kendall and Harry are in a relationship, her brother did note she is at the age where she will just enjoying ''dating''.
He insisted: ''She is at that age where dating is a lot of fun.''
The actress spoke about raising her 11 year old daughter Matilda in the wake of Heath Ledger's death eight years ago.