Megawati binti Dato Paduka Haji Manan is a Bruneian diplomat and holding the post of Ambassador Extraordinary and Plenipotentiary of Brunei to the Philippines since 2023.

During a ceremony held in the Reception Hall of Malacañang Palace on 23 March 2023, President Ferdinand R. Marcos Jr. accepted the credential letters from Megawati, the Ambassador of Brunei Darussalam to the Philippines.

[6] Megawati and the Bruneian delegation participated in the 3rd Joint Commission for Bilateral Cooperation (JCBC) held in Metro Manila on 18 August 2023.

[9] On 13 March 2024, Megawati threw a dinner event at the Dusit Thani Manila's Mayuree Grand Ballroom to commemorate the 40th anniversary of Brunei Darussalam's National Day.

[11] Megawati is the daughter of Koperasi Security Officer Training School's (KOPRI) CEO, Dato Paduka Haji Manan bin Osman.