diff --git a/lib/Subtitle/SSA.pm b/lib/Subtitle/SSA.pm
index b6fd2a3..bbbe018 100644
--- a/lib/Subtitle/SSA.pm
+++ b/lib/Subtitle/SSA.pm
@@ -203,4 +203,48 @@ sub parse {
   return scalar @{ $self->{events} };
 }
 
+sub build {
+  my ($self) = @_;
+  my $out = "[Script Info]\n";
+
+  # headers
+  foreach my $h (sort keys($self->{headers})) {
+    $out .= sprintf "%s: %s\n", $h, $self->{headers}->{$h};
+  }
+  $out .= "\n";
+
+  # styles
+  if ($self->{type} eq 'ass') {
+    $out .= "[V4+ Styles]\n";
+    $out .= sprintf "Format: %s\n", join(', ' => @{ $self->ASS_STYLE_FMT });
+  } else {
+    $out .= "[V4 Styles]\n";
+    $out .= sprintf "Format: %s\n", join(', ' => @{ $self->SSA_STYLE_FMT });
+  }
+  my @fields = @{ $self->{style_fmt} };
+  foreach my $s (@{ $self->{styles} }) {
+    $out .= sprintf "Style: %s\n", join(",", @{$s}{@fields});
+  }
+  $out .= "\n";
+
+  # events
+  $out .= "[Events]\n";
+  if ($self->{type} eq 'ass') {
+    $out .= sprintf "Format: %s\n", join(', ' => @{ $self->ASS_EVENT_FMT });
+  } else {
+    $out .= sprintf "Format: %s\n", join(', ' => @{ $self->SSA_EVENT_FMT });
+  }
+  @fields = @{ $self->{event_fmt} };
+  foreach my $e (@{ $self->{events} }) {
+    my %event = %{$e};
+    $event{start} = $self->build_timing($event{start});
+    $event{end}   = $self->build_timing($event{end});
+    $event{marked} =~ s/^/Marked=/o if $self->{type} eq 'ssa';
+    $out .= sprintf "%s: %s\n", ucfirst($e->{type}), join(',' => @event{@fields});
+  }
+  $out .= "\n";
+
+  return $out;
+}
+
 1;