No they both appeared as guest stars on "The Lucy Show" in 1966 but not on the same episode.
for a full list of celebrity guest stars with Lucy see the related link below
The four Pevensies brothers appear together on The Lion, the Witch and The Wardrobe (book 2) and Prince Caspian (book 4). Lucy and Edmund appear and The Voyage of the Dawn Treader (book 5). Edmund, Lucy and Susan appear on The Horse and His Boy (book 3). Peter, Edmund and Lucy appear on The Last Battle (book 7).
Lucy Martin was born on 1990-05-05.
The Lucy Show - 1962 Lucy and John Wayne 5-10 is rated/received certificates of: Australia:G
Here's Lucy - 1968 Lucy and Wayne Newton 2-22 is rated/received certificates of: Australia:G
Here's Lucy - 1968 Lucy and Wayne Newton 2-22 was released on: USA: 16 February 1970
I Love Lucy - 1951 Lucy and John Wayne 5-2 was released on: USA: 10 October 1955
Here's Lucy - 1968 Lucy Sells Craig to Wayne Newton - 1.9 was released on: USA: 25 November 1968
The Lucy Show - 1962 Lucy Discovers Wayne Newton 4-14 was released on: USA: 27 December 1965
Here's Lucy - 1968 Lucy Sells Craig to Wayne Newton 1-9 is rated/received certificates of: Australia:G
Here's Lucy - 1968 Lucy Sells Craig to Wayne Newton 1-9 was released on: USA: 25 November 1968
No, Mary did not appear to Saint Lucy.
Lucy Kellaway has written: 'Martin Lukes' 'The Answers'