The committee has called in the three lobbyists as it continues its inquiry in to the public affairs industry. They will appear at 10am on Thursday 7 February.
Zetter, Cartwright and Morris will seek to persuade the MPs that there is no need to force a robust system of regulation on to the industry.
But they will also use the opportunity to attack agencies such as Bell Pottinger and DLA Piper that refuse to sign up to voluntary industry-wide ethical codes.
The select committee had been due to hold a session yesterday in which it would explore the links between MPs and big business.
However, the session with the MPs John Greenway, Nick Harvey and Ian McCartney was cancelled and will now be rearranged for a later date.
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