The former child star tweeted a photo of herself Wednesday night with the caption: "Me and my bestie @itstroyjensen! Happy Holidays!"
Bynes wore a sexy black lace dress and matching leather jacket while hugging Jensen, a makeup artist.
The actress has been doing well since being placed on a psychiatric hold in October 2014 after displaying worrisome behavior, including going on a Twitter tirade against her father.
A family source told ABC News in February, "Amanda is doing much better from where she was months ago. She has her own apartment and is much happier. She and her parents are getting along and Amanda is clear-headed, more focused and has more independence."