Chairman of the Home Affairs Select Committee Keith Vaz said Theresa May would be questioned by MPs over her plan to bring in new surveillance laws on April 24.
The Home Office intends to bring in powers that would allow emails, texts and website visits to be monitored.
The committee is looking forward to questioning the Home Secretary on a number of issues, in particular the Government's proposals to introduce laws allowing the monitoring of all emails, texts and web use in the UK."
Liberal Democrat president Tim Farron vows the party would "kill" proposals for increased monitoring of emails and internet use.
Ministers are preparing a major expansion of powers to monitor the email exchanges and website visits of every person in the UK.