The Glee actress was pictured hiking with her other half on Friday, 18 April, shortly before they enjoyed a dinner to celebrate one year since they first crossed paths.
Lea met Matthew on the set of her music video 'On My Way', and on Saturday evening, she and Matthew joined the music video's director for a dinner to mark the one-year anniversary.
Romance blossomed quickly between Lea and Matthew and soon turned serious, with Matt moving in with the actress four months after they started dating.
Now that Glee has wrapped for good, Lea has moved on to new projects including working on new TV series Scream Queens and a new album.
Scream Queens is a new horror-comedy from Glee creator Ryan Murphy based on a college campus which is rocked by a series of murders. Other stars include Emma Roberts and Jamie Lee Curtis.
Meanwhile, Lea has also been in the studio working on a follow-up to debut album Louder.
She shared an image from the recording studio last week, telling fans: "The past two years since finishing #Louder I've experienced so many moments of strength, tears, joy, growth, change and happiness.
"I'm so excited to put all of that into this next record.. I'm so grateful to be where I am today feeling so strong. And nothing makes me happier than singing from my heart, it's the greatest feeling and I'm so beyond excited!"