Monika, Princess of Hanover, Duchess of Brunswick-Lüneburg (born Countess Monika zu Solms-Laubach; 8 August 1929 – 4 June 2015) was a German noblewoman and philanthropist. She was the second wife of Ernest Augustus, Prince of Hanover. A member of the House of Solms-Laubach by birth, she became the Princess Consort of Hanover and Duchess of Brunswick-Lüneburg through her marriage. She was the founder of the Dollhouse Museum in Laubach.