Channel 4 news reporter Katie Razzall and filmmaker Olly Lambert will both join the BBC Two news and current affairs programme.
Razzall joins the team as a special correspondent and will cover a wide range of topics including religion, legal affairs and disability issues.
Newsnight editor Ian Katz said: "Katie is one of the most versatile and compelling broadcast journalists in the business. I've long admired her distinctive voice and original reporting and am thrilled that she is joining the Newsnight team."
Meanwhile, Razzall said of her new role: "I have lived and breathed Channel 4 News for 14 years, a period of time and a programme of which I am immensely proud.
"However, the opportunity to join Newsnight at such an exciting time in the show's evolution was just too good to ignore. I'm greatly looking forward to a wide-ranging brief