Britney Spears sealed the deal with co-star Neil Patrick Harris in last night’s episode of How I Met Your Mother.

The recovering pop mess reprised her role as love-struck receptionist Abby, following her successful guest spot on the US TV show in March.

The show's co-creator, Craig Thomas, was so impressed with Britney's performance second time round that the door has been left open for her to return next season

"She was better than the first time and I think fans will enjoy it because her return answers a mystery set up earlier in the series," he says via the Daily Mail. 

Britney also seems to be enjoying her new acting sideline, enthusing in a statement: "I had such a great experience the last time I was on the show that I couldn't wait to come back."

"Abby is going to have a lot of fun!"

Click to see Britney in action in How I Met Your Mother last night