The Crown star Matt Smith turned 36 on Sunday, and on Saturday he was seen leaving the restaurant 34 Mayfair in London.

Smith, who plays Prince Philip, Duke of Edinbugh and Queen Elizabeth IIs husband in the Netflix Drama series, celebrated with his mother and his girlfriend, Downton Abbey star Lily James. 

Season three of The Crown is set to air in 2019, and the film adaptation of Downton Abbey is also scheduled to be released next year.

James and Smith sparked engagement rumors in February after the former was spotted wearing a big, elegant ring at the BAFTA awards. However, no engagement has thus far been confirmed for the couple.

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James recently starred in the summer sequel Mamma Mia! Here We Go Again, in which she played a younger version of Meryl Streeps character.

Although Claire Foy played the Queen in the first two seasons of The Crown, Olivia Colman is set to replace her for seasons 3 and 4.

Both The Crown and Downton Abbey have received critical acclaim and won multiple awards.

Downton Abbey even broke a record by becoming the most-nominated non-U.S. television series at the Emmys after receiving 69 nominations over the course of five years.