SUPPLEMENT DATED APRIL 1, 2020 TO THE STATEMENT OF ADDITIONAL INFORMATION OF
MORGAN STANLEY VARIABLE INVESTMENT SERIES
THE INCOME PLUS PORTFOLIO
Dated April 30, 2019

The eighth paragraph of the section of the Statement of Additional Information entitled "Disclosure of Portfolio Holdings" is hereby deleted and replaced with the following:

Portfolio holdings information may be provided to broker-dealers, prime brokers, futures commission merchants, or similar providers in connection with each Fund's portfolio trading or operational processing activities; such entities generally need access to such information in the performance of their duties and responsibilities to fund service providers and are subject to a duty of confidentiality, including a duty not to trade on material non-public information, imposed by law or contract. Portfolio holdings information may also be provided to affiliates of Morgan Stanley Investment Management ("MSIM") pursuant to regulatory requirements or for legitimate business purposes, which may include risk management, or may be reported by each Fund's counterparties to certain global trade repositories pursuant to regulatory requirements.

Please retain this supplement for future reference.