Constant Warwick was a 32-gun fourth-rate frigate which served in the English Royal Navy, built by Peter Pett I at Ratcliff and launched in 1645. She is sometimes regarded as the 'first English frigate', although a number of vessels built or acquired earlier (during the 1630s and 1640s) also merit a similar description. The term 'frigate' during the period of this ship referred to a method of construction, rather than a role which did not develop until the following century.